CVE-2025-40601

Published Nov 20, 2025

Last updated 3 months ago

CVSS high 7.5
Sonicwall

Overview

Description
A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.
Source
PSIRT@sonicwall.com
NVD status
Analyzed
Products
sonicos

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity
HIGH

Weaknesses

PSIRT@sonicwall.com
CWE-121

Social media

Hype score
Not currently trending
  1. Recent reports show the Akira ransomware is targeting business mergers by hiding in unpatched VPNs (CVE-2025-40601). When you acquire the company, you acquire the malware. Always audit the IT stack before the handshake. We can help. 🤝 #CyberSecurity #FremontNE #BusinessTips

    @NyeTechnology

    13 Feb 2026

    41 Impressions

    0 Retweets

    0 Likes

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    0 Replies

    0 Quotes

  2. #VulnerabilityReport #bufferoverflow SonicWall Warns of New SonicOS SSLVPN Pre-Auth Buffer Overflow Vulnerability (CVE-2025-40601) https://t.co/yF8nPW96UT

    @Komodosec

    28 Dec 2025

    24 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  3. ⚠️Vulnerabilidades en productos SonicWall ❗CVE-2025-40601 ➡️Más info: https://t.co/lZhWXQqSzS https://t.co/m7ER3oJn87

    @CERTpy

    26 Nov 2025

    93 Impressions

    0 Retweets

    2 Likes

    0 Bookmarks

    0 Replies

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  4. [Security Affairs] SonicWall flags SSLVPN flaw allowing firewall crashes. SonicWall warns of a high-severity buffer overflow flaw in SonicOS SSLVPN (CVE-2025-40601) that lets attackers crash Gen7 and Gen8 firewalls. A new high-severity SonicOS SSLVPN... https://t.co/GhPjDoHB1F

    @shah_sheikh

    23 Nov 2025

    13 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  5. 🔴 SonicOS SSLVPN DoS Crashes Remote Firewalls (CVE-2025-40601) SonicWall's SonicOS has a critical DoS flaw in SSLVPN that crashes firewall appliances remotely. CVE-2025-40601 affects SonicOS 7.1.4-7.1.7 on Gen 7 firewalls—attacker sends crafted packets to trigger the crash

    @the_c_protocol

    22 Nov 2025

    31 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  6. SonicWall SSLVPN Vulnerability: How to Patch CVE-2025-40601 and Prevent DoS Attacks. Read the full report on - https://t.co/x29jQ0SQ9M https://t.co/yy5M42SqGf

    @cyberbivash

    22 Nov 2025

    3 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

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  7. New SonicWall SonicOS flaw allows hackers to crash firewalls. Tracked as CVE-2025-40601, this denial-of-service vulnerability is caused by a stack-based buffer overflow impacting Gen8 and Gen7 (hardware and virtual) firewalls. https://t.co/CZFF9Lo9Fh https://t.co/jMr6neglLb

    @riskigy

    21 Nov 2025

    21 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  8. SonicWall patched a high-severity SonicOS SSLVPN flaw (CVE-2025-40601) allowing unauthenticated DoS attacks on Gen7/Gen8 firewalls. No exploits seen, but users should update ASAP. 🔒 #CyberSecurity #SonicWall #InfoSec https://t.co/i6wV6CXMed

    @ProgresiveRobot

    21 Nov 2025

    32 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  9. ⚠️⚠️ CVE-2025-40601: A pre-authentication stack-based buffer overflow in SonicOS SSLVPN allows a remote attacker to crash the firewall (DoS). 🔗FOFA Link: https://t.co/zAofIGTu9d 🎯9.9k+ Results are found on the https://t.co/pb16tGYaKe nearly year. FOFA Query: app="So

    @fofabot

    21 Nov 2025

    889 Impressions

    3 Retweets

    4 Likes

    2 Bookmarks

    0 Replies

    0 Quotes

  10. 🚨Alert🚨:CVE-2025-40601 : A Stack-based Buffer Overflow Vulnerability in the SonicOS SSLVPN Service 📊10.7K Services are found on the https://t.co/ysWb28BTvF yearly. 🔗Hunter Link:https://t.co/7lZnlpHCCa 👇Query HUNTER : https://t.co/q9rtuGfZuz="SonicOS" https://t.co/Y

    @HunterMapping

    21 Nov 2025

    1938 Impressions

    5 Retweets

    22 Likes

    8 Bookmarks

    0 Replies

    0 Quotes

  11. 🚨PATCH NOW🚨 SonicWall SonicOS CVE-2025-40601 lets remote unauth attackers crash Gen7/Gen8 firewalls via SSLVPN buffer overflow. Search by vul.cve Filter👉vul.cve="CVE-2025-40601" ZoomEye Dork👉app="SonicWall SonicOS" 51.1k+ exposed instances. ZoomEye Link: https://t.c

    @zoomeye_team

    21 Nov 2025

    1218 Impressions

    3 Retweets

    14 Likes

    9 Bookmarks

    0 Replies

    0 Quotes

  12. SonicWall advisory: Stack buffer overflow in SonicOS SSLVPN. CVE-2025-40601. Vendor says DoS only. But stack overflows in VPN implementations usually turn into RCE - initial assessments underestimate exploitability. Patch immediately. SonicWall has a history here

    @gothburz

    21 Nov 2025

    163 Impressions

    1 Retweet

    3 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  13. SonicWall SonicOS CVE-2025-40601 lets remote unauth attackers crash Gen7/Gen8 firewalls via SSLVPN. Patch sooner than later, exposed VPNs tend to find friends fast. #infosec https://t.co/oGCyAdeVEI

    @threatcluster

    20 Nov 2025

    36 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  14. SonicWall alerta para falha severa no SSLVPN que pode derrubar firewalls: vulnerabilidade CVE-2025-40601 permite DoS por buffer overflow em firewalls Gen7 e Gen8, sem exploração conhecida. Recomenda patch imediato e restringir acesso ao serviço. https://t.co/xyaUX4X0tj

    @caveiratech

    20 Nov 2025

    34 Impressions

    0 Retweets

    1 Like

    0 Bookmarks

    0 Replies

    0 Quotes

  15. CVE-2025-40601 Stack-Based Buffer Overflow in SonicOS SSLVPN Service Enables Rem... https://t.co/tWKbW9vrY2 Customizable Vulnerability Alerts: https://t.co/U7998fz7yk

    @VulmonFeeds

    20 Nov 2025

    3 Impressions

    0 Retweets

    0 Likes

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    0 Replies

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  16. A critical SonicWall SonicOS flaw (CVE-2025-40601) allows denial-of-service crashes via SSLVPN stack-based buffer overflow in Gen7 and Gen8 firewalls. No active exploits reported yet. #SonicWall #FirewallFlaw #USA https://t.co/nh6UG1oZ83

    @TweetThreatNews

    20 Nov 2025

    77 Impressions

    0 Retweets

    1 Like

    0 Bookmarks

    1 Reply

    0 Quotes

  17. CVE-2025-40601 A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause… https://t.co/SxEo3iwWIH

    @CVEnew

    20 Nov 2025

    273 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations

References

Sources include official advisories and independent security research.