CVE-2025-40551

Published Jan 28, 2026

Last updated a month ago

CVSS critical 9.8
SolarWinds Web Help Desk
Cloud
Supply chain

Overview

Description
SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.
Source
psirt@solarwinds.com
NVD status
Analyzed
Products
web_help_desk

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

psirt@solarwinds.com
CWE-502

Social media

Hype score
Not currently trending
  1. 🛡️ Alerta de Seguridad: Vulnerabilidad de Deserialización de Datos No Confiables en SolarWinds Web Help Desk (CVE-2025-40551) SolarWinds Web Help Desk presenta una vulnerabilidad de deserialización de datos no confiables (CWE-502) que permite ejecución remota de código (

    @CiberPlanetaOrg

    16 Mar 2026

    3 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  2. Top 30 CVEs for ecosystem (30 days). Top CVEs: CVE-2022-20775, CVE-2025-40551, CVE-2026-1731 VulnSocial — your risk exposure provider. #vulnsocial #CVE #CyberSecurity #VulnerabilityManagement https://t.co/S02Q7THYkX

    @vulnsocial

    6 Mar 2026

    2 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  3. CISA is mandating a 3-day patch window for CVE-2025-40551 in SolarWinds Web Help Desk since active exploitation has been confirmed. Full IOCs, attack chain & playbook in our weekly Intel Brief → https://t.co/xsy5V1ByJm #Cybersecurity #ThreatIntel https://t.co/FTBkNEc1HP

    @Osec__

    5 Mar 2026

    4 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  4. “SolarWinds Web Help Desk” platformasında boşluq (CVE-2025-40551) aşkar olunub. #ETX #MilliCERT #cybersecurity #kibertəhlükəsizlik #xəbərdarlıq https://t.co/FCXDCAFABW

    @CERTAzerbaijan

    5 Mar 2026

    110 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  5. Top 30 CVEs for ecosystem (30 days). Top CVEs: CVE-2022-20775, CVE-2026-1281, CVE-2025-40551 VulnSocial — your risk exposure provider. #vulnsocial #CVE #CyberSecurity #VulnerabilityManagement https://t.co/S02Q7THYkX

    @vulnsocial

    5 Mar 2026

    0 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  6. Top 10 CVEs for ecosystem (30 days). CVE-2010-5139 CVE-2004-0200 CVE-2008-0015 CVE-2024-43468 CVE-2025-40551 CVE-2018-17144 CVE-2025-11953 CVE-2026-2441 CVE-2026-1731 https://t.co/cWlQJaYf4S #CyberInsights #SecurityUpdate #CyberTrends #TechSecurity #CyberNews #DataProtection

    @vulnsocial

    2 Mar 2026

    0 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  7. 🚨 #CVE-2025-40551 Exploited In The Wild Just 48 Hours After Disclosure – Your #SolarWinds Helpdesk Is Already At Risk + Video https://t.co/9qK0M99ckl Educational Purposes!

    @UndercodeUpdate

    24 Feb 2026

    42 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  8. Interesting case with CVE-2025-40551 (SolarWinds Helpdesk). We started seeing exploitation activity in our honeypots less than 2 days after disclosure. That early signal meant our customers had visibility into in-the-wild activity several days before broader confirmation later

    @noktec

    24 Feb 2026

    118 Impressions

    1 Retweet

    2 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  9. Critical Vulnerability Breakdown: SolarWinds Web Help Desk (CVE-2025-40551) 🚨 A newly disclosed flaw in SolarWinds Web Help Desk enables unauthenticated remote code execution, and it’s not just another CVE, it’s part of a dangerous exploit chain that can lead attackers str

    @RidgeSecurityAI

    18 Feb 2026

    52 Impressions

    1 Retweet

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  10. CVE-2025-40551: SolarWinds, back with another CVSS 9.8 Java deserialization RCE. Static passwords too, because why not? Active exploits, domains fall. 2020 déjà vu. SolarWinds: leaving doors, windows open, and key under the mat—again. Patch or join the mugshot club.

    @CisoRaging77913

    12 Feb 2026

    40 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  11. Microsoft and Huntress reported active exploitation of a serious vulnerability in SolarWinds’ Web Help Desk (WHD), CVE-2025-40551, which SolarWinds patched on January 28, 2026. https://t.co/bYA4LEH7Wa

    @CognitiveAsia

    11 Feb 2026

    46 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  12. 🚨 SolarWinds Web Help Desk Flaws Actively Exploited to Deploy C2, Tunnels, and SSH Backdoors Attackers are exploiting SolarWinds Web Help Desk vulnerabilities (CVE-2025-40551, CVE-2026-26399) for initial access, then installing a maliciously configured Zoho ManageEngine Assist

    @ThreatSynop

    11 Feb 2026

    89 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  13. Attackers are exploiting SolarWinds Web Help Desk (WHD) using a chain of vulnerabilities, including two zero-days (vulnerabilities CVE-2025-40551 and CVE-2025-40536). These flaws allow remote code execution and authentication bypass. If you use SolarWinds WHD, update to the

    @cybernewslive

    10 Feb 2026

    83 Impressions

    1 Retweet

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  14. Active exploitation of SolarWinds Web Help Desk (CVE-2025-26399, CVE-2025-40551): actors deployed Zoho ManageEngine RMM and Velociraptor via MSIs staged on Catbox and Supabase; affected versions prior to 12.8.7 HF1. #solarwinds #velociraptor #zoho https://t.co/BlZ01sATAW

    @hasamba

    10 Feb 2026

    39 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  15. 最近修正されたSolarWindsの脆弱性、ゼロデイとして悪用されていた可能性(CVE-2025-40551他) | Codebook|Security News https://t.co/vDNFSrYhMd

    @ohhara_shiojiri

    10 Feb 2026

    69 Impressions

    0 Retweets

    0 Likes

    1 Bookmark

    0 Replies

    0 Quotes

  16. 🚨 SolarWinds Web Help Desk CVE-2025-40551 Active Exploitation Campaign [Critical] Feb 10, 2026 Checkout our Threat Intelligence Platform: https://t.co/QuwNtEgYh1 https://t.co/QuwNtEgYh1 #ThreatIntelligence #CyberSecurity #Innovation #LLM https://t.co/SHBQF9cRtr

    @transilienceai

    10 Feb 2026

    40 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  17. Security deep dive: Critical Analysis CVE-2025-40551 - SolarWinds Web Help Desk Deserialization.... Actionable advice for practitioners. Read more: https://t.co/x7WkSzjSt1

    @TomarPrateek23

    10 Feb 2026

    36 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  18. ⚠️最近修正されたSolarWindsの脆弱性、ゼロデイとして悪用されていた可能性(CVE-2025-40551他) 〜サイバーアラート 2/10〜 https://t.co/RRhK8euNNp

    @MachinaRecord

    10 Feb 2026

    9 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  19. Critical Solarwinds vulns are being actively exploited. Extensive info, incl. fix info, at SecAlerts: CVE-2025-40551 (CVSS 9.8) - https://t.co/naxlLilyde CVE-2025-26399 (CVSS 9.8) - https://t.co/oLzBFWDokL #ciso #cio #cto #vulnerabilities #cybersecurity #msp #mssp #solarwinds

    @SecAlertsCo

    10 Feb 2026

    5 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  20. Descubre el CVE-2025-40551 y su impacto en SolarWinds. Más info aquí: https://t.co/rfpwB4b6zW #Ciberseguridad #SolarWinds

    @AlejosAngel

    9 Feb 2026

    45 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  21. SolarWinds Web Help Desk Exploited for RCE in Multi-Stage Attacks on Exposed Servers. Last week, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2025-40551 to its Known Exploited Vulnerabilities (KEV) catalog. https://t.co/xdoYXE6ETW https://t.co/H4xpac

    @riskigy

    9 Feb 2026

    47 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  22. The most slept-on #CyberDeception feature is negative MTTD/MTTR for emerging threats. #SolarWinds unsafe deserialization, CVE-2025-40551: Disclosed 1/29/26 and added to #KEV 2/3/26. Divert has blocked anything that touched #SolarWind endpoints since last April in our PoC. https:/

    @Divert_Security

    9 Feb 2026

    65 Impressions

    0 Retweets

    1 Like

    0 Bookmarks

    0 Replies

    0 Quotes

  23. Active SolarWinds Web Help Desk exploits (CVE-2025-40551+) lead to domain takeover. From RCE to DCSync in weeks. Thread on tactics + hunts. https://t.co/kG1YkaALc4 #ZeroDaysCVEs #Cybersecurity #Infosec ⚠️🔍

    @CyberEdition

    9 Feb 2026

    56 Impressions

    0 Retweets

    0 Likes

    1 Bookmark

    0 Replies

    0 Quotes

  24. CVE-2025-26399 / CVE-2025-40551 / CVE-2025-40536  ⚠️ SolarWinds Web Help Desk – Actively Exploited RCE  SolarWinds Web Help Desk (WHD) installations exposed to the internet are being actively exploited via unauthenticated remote code execution.  Observed intrusions sho

    @modat_magnify

    9 Feb 2026

    144 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  25. 🚨 SolarWinds Web Help Desk RCE Exploited to Drop Zoho Assist, Velociraptor, and Cloudflared Tunnels Attackers are actively exploiting SolarWinds Web Help Desk deserialization flaws (notably CVE-2025-40551 / CVE-2025-26399, plus related CVE-2025-40536) to gain unauthenticated

    @ThreatSynop

    9 Feb 2026

    74 Impressions

    0 Retweets

    0 Likes

    1 Bookmark

    0 Replies

    0 Quotes

  26. #ITSecurity SolarWinds again and reminders: CVE-2025-40551Unauthenticated RCE via AjaxProxy deserialization, 9.8 Remote command execution CVE-2025-40536 Protection bypass via bogus “/ajax/” parameter, 8.1 Access to restricted WebObjects

    @seaarepea

    8 Feb 2026

    41 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  27. 【情シス必読】Officeファイルは「見るだけ」で感染します。 SolarWindsとOfficeの脆弱性(CVE-2025-40551、CVE-2026-21509)が悪用されAD乗っ取りの危機です。「マクロ無効化」では防げません。👇 https://t.co/CvTYL87kX6 #Mb_S

    @sec_mb

    8 Feb 2026

    93 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  28. 🚨 CVE-2025-40551 - critical 🚨 SolarWinds Web Help Desk < 2026.1 - Unauthenticated JNDI Injection RCE > SolarWinds Web Help Desk before version 2026.1 contains an insecure deserialization v... 👾 https://t.co/3ZHUc8BJ2K @pdnuclei #NucleiTempl...

    @pdnuclei_bot

    8 Feb 2026

    181 Impressions

    0 Retweets

    1 Like

    1 Bookmark

    0 Replies

    0 Quotes

  29. Microsoft Defender 연구팀은 SolarWinds Web Help Desk(WHD)의 취약점을 악용한 실제 공격 사례를 발견 현재 추가 조사를 통해 악용된 실제 취약점( CVE-2025-40551 (신뢰할 수 없는 데이터 역직렬화), CVE-2025-40536 (보안 제어 우회),

    @ngnicky

    7 Feb 2026

    124 Impressions

    0 Retweets

    0 Likes

    2 Bookmarks

    0 Replies

    0 Quotes

  30. SolarWinds RCE flaw (CVE-2025-40551) is now on CISA’s KEV list, proof that attackers exploit low-complexity bugs in trusted platforms. Insight from Cobalt’s Joe Brinkley in @ComputerWeekly: https://t.co/7LbucAir11 #cybersecurity #pentesting #infosec

    @cobalt_io

    7 Feb 2026

    183 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  31. An urgent warning regarding a critical remote code execution (RCE) vulnerability in SolarWinds Web Help Desk. The vulnerability, tracked as CVE-2025-40551, exploits unsafe deserialization of untrusted ... 🛜 Read More @ https://t.co/u3sXp1Z2Q2

    @Roguevaultnews

    7 Feb 2026

    0 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  32. Analysis of active exploitation of SolarWinds Web Help Desk - https://t.co/InJP6reBJn #threatintel #solarwinds-web-help-desk #cve-2025-40551 #cve-2025-40536 #cve-2025-26399 #rce-exploitation

    @RedPacketSec

    7 Feb 2026

    96 Impressions

    1 Retweet

    1 Like

    0 Bookmarks

    0 Replies

    0 Quotes

  33. Recent reporting by Microsoft Security Blog highlights active exploitation of SolarWinds Web Help Desk (WHD) through unpatched vulnerabilities, including newly disclosed CVE-2025-40551 and CVE-2025-40536. While the report does not explicitly attribute the attacks to

    @ox0ffff

    7 Feb 2026

    57 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  34. Just published: Critical Analysis CVE-2025-40551 - SolarWinds Web Help Desk Deserialization.... Practical security guidance from the trenches. Read more: https://t.co/Q2v41DXx91

    @TomarPrateek23

    7 Feb 2026

    56 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  35. Recent reporting by CISA KEV highlights a critical vulnerability in SolarWinds Web Help Desk, designated CVE-2025-40551, which exposes systems to remote code execution without authentication. This development occurs amid escalating global cyber conflict dynamics, where

    @ox0ffff

    6 Feb 2026

    50 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  36. Patch latency is becoming a national security risk. IT support tools are now part of the attack surface. CISA added CVE-2025-40551 in SolarWinds Web Help Desk to the KEV list. Government agencies must remediate it by Feb 6, 2026. This pushes zero-day response pressure deep into

    @MartinSzerment

    6 Feb 2026

    59 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  37. 🚨 SolarWinds Web Help Desk Critical RCE (CVE-2025-40551) Now Actively Exploited in the Wild Cybersecurity Dive reports active exploitation of CVE-2025-40551 (CVSS 9.8), an unauthenticated insecure-deserialization flaw in SolarWinds Web Help Desk that enables remote code

    @ThreatSynop

    6 Feb 2026

    72 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  38. 🚨 SolarWinds Web Help Desk Under Active Exploitation: Unauth RCE (CVE-2025-40551) Forces Rapid Patching UpGuard’s vulnerability overview details CVE-2025-40551 (CVSS 9.8) in SolarWinds Web Help Desk, an untrusted deserialization bug in the AjaxProxy component that enables

    @ThreatSynop

    6 Feb 2026

    63 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  39. 🚨 URGENTE: CISA ordena el parcheo inmediato de SolarWinds Web Help Desk antes del 6 de febrero. La vulnerabilidad CVE-2025-40551 (RCE crítica 9.8) está siendo explotada activamente según Horizon3ai. ¡Actualiza a la versión 2026.1 ya! 💻🔥 #SolarWinds #CISA #CyberAtta

    @ciberconciencia

    5 Feb 2026

    98 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  40. CISAがSolarWinds Web Help Deskの脆弱性のサイバー攻撃への悪用確認(CVE-2025-40551) https://t.co/TM3RJ8dWLB #セキュリティ対策Lab #セキュリティ #Security #CybersecurityNews

    @securityLab_jp

    5 Feb 2026

    118 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  41. SolarWinds Web Help Desk flaw CVE-2025-40551 is under active exploitation, with 170+ internet-exposed installs vulnerable to unauthenticated RCE; CISA adds bug to KEV and orders rapid patching. https://t.co/Xn14T4terd

    @threatcluster

    5 Feb 2026

    48 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  42. CVE-2025-40551 was added to CISA’s Known Exploited Vulnerabilities Catalog on Tuesday. Federal civilian agencies have to patch it until Friday. #CISA #cybersecurity https://t.co/okeAqRzsgI

    @CyberNews

    5 Feb 2026

    330 Impressions

    1 Retweet

    2 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  43. 🚨 170+ SolarWinds Web Help Desk Servers Exposed to Actively Exploited Unauth RCE (CVE-2025-40551) Over 170 internet-facing SolarWinds Web Help Desk instances are still vulnerable to an unauthenticated insecure-deserialization RCE (CVSS 9.8) in AjaxProxy, now confirmed exploite

    @ThreatSynop

    5 Feb 2026

    52 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  44. #SolarWinds confirms active exploitation of Web Help Desk flaws. CVE-2025-40551 enables unauthenticated RCE via AjaxProxy deserialization and is listed in CISA KEV. Additional WHD RCE and auth bypass issues identified; exploitation unconfirmed. https://t.co/TMY3gpnRtJ

    @MeridianEU

    5 Feb 2026

    88 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  45. For the last few days, we have been sharing SolarWinds Help Desk CVE-2025-40551 RCE vulnerable IPs (version check based) - ~170 seen. This vuln is now on @CISACyber KEV. Data in Vulnerable HTTP reports: https://t.co/qxv0Gv5ELc Dashboard Tree Map view: https://t.co/zzg4wFSQVr ht

    @Shadowserver

    5 Feb 2026

    1998 Impressions

    6 Retweets

    17 Likes

    2 Bookmarks

    1 Reply

    1 Quote

  46. 🚨 CVE-2025-40551 (CVSS 9.8): SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which

    @zoomeye_team

    5 Feb 2026

    1164 Impressions

    3 Retweets

    14 Likes

    7 Bookmarks

    0 Replies

    0 Quotes

  47. 🚨 CVE-2025-40551 (CVSS 9.8): SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which

    @zoomeye_team

    5 Feb 2026

    36 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  48. Security deep dive: Critical Analysis CVE-2025-40551 - SolarWinds Web Help Desk Deserialization.... Actionable advice for practitioners. Read more: https://t.co/Cf7CJ2EURY #

    @TomarPrateek23

    5 Feb 2026

    48 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  49. Critical Vulnerability Alert: CVE-2025-40551 in SolarWinds Web Help Desk https://t.co/GvRNvawxs4

    @StratoKey

    4 Feb 2026

    16 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  50. Today's #Cybersecurity Pulse (Feb 4, 2026): CISA adds critical SolarWinds Web Help Desk RCE flaw (CVE-2025-40551) to KEV catalog — patch NOW! Interlock ransomware deploys new "Hotta Killer" to evade EDR via driver exploits. Italy thwarts Russia-linked attacks on embassies &

    @ImperialTechSvc

    4 Feb 2026

    1 Impression

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations