CVE-2026-13684

Published Sep 18, 2026

Last updated 2 months ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-13684 is identified as an improper encoding or escaping of output vulnerability found within the SCGI component of Synology DiskStation Manager (DSM). This flaw affects DSM versions prior to 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The vulnerability enables remote attackers to perform actions such as reading or writing arbitrary files and initiating denial-of-service attacks.

Description
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
Source
security@synology.com
NVD status
Awaiting Analysis

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

security@synology.com
CWE-116

Social media

Hype score
Not currently trending
  1. 『经详细排查发现,本轮攻击的切入点是两个高危远程漏洞,CVE编号分别为CVE-2026-13639和CVE-2026-13684。』 Cerber勒索攻击群晖NAS事件预警-安全资讯-360官网 https://t.co/QDKhUGOlCw

    @autumn_good_35

    2 Nov 2026

    563 Impressions

    0 Retweets

    0 Likes

    1 Bookmark

    1 Reply

    0 Quotes

  2. Warning: Critical vulnerabilities in #Synology DSM. CVE-2026-13639 & CVE-2026-13684 CVSS:9.8. Successful exploitation of these vulnerabilities could allow an unauthenticated attacker to read or write arbitrary files and potentially conduct denial-of-service attacks #DoS. #Pa

    @CCBalert

    21 Sept 2026

    424 Impressions

    1 Retweet

    2 Likes

    3 Bookmarks

    1 Reply

    0 Quotes

  3. 🚨 SYNOLOGY DSM CRITICAL: UNAUTH ARBITRARY FILE R/W (CVSS 9.8) Synology published Synology-SA-26:13 for DiskStation Manager, rating the advisory Critical. Two unauthenticated remote vulnerabilities are scored CVSS 9.8: • CVE-2026-13684 — SCGI improper encoding/escaping; h

    @DailyDarkWeb

    19 Sept 2026

    6327 Impressions

    2 Retweets

    18 Likes

    9 Bookmarks

    0 Replies

    0 Quotes

  4. 🔐🚨 SYNOLOGY DSM — CVSS 9.8 ×2 CVE-2026-13639: Insufficient entropy → session token prediction CVE-2026-13684: SCGI injection → arbitrary file read/write → https://t.co/6F99iDQezo #Synology #DSM #CVE #NAS #PatchNow #CyberSecurity #ThreatIntel

    @ThreatAft

    18 Sept 2026

    45 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

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  5. Synology fixed 8 DSM vulnerabilities, including two critical unauthenticated flaws (CVE-2026-13684, CVE-2026-13639) on DiskStation Manager. Update now. #Synology #DSM #NAS #CVE #Vulnerability #DiskStation #InfoSec #PatchNow #NetworkSecurity #DataStorage https://t.co/sQyw593efh

    @Daily_CyberSec

    18 Sept 2026

    349 Impressions

    0 Retweets

    3 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

References

Sources include official advisories and independent security research.