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CVE-2026-86343

Quick assessment

Affected

Synology DiskStation Manager (DSM)

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

群晖 DiskStation Manager (DSM) 7.3.2-86009-5 和 7.4.1-90080-1 之前版本中的 SNMP API 存在 CRLF 序列不当中和漏洞，允许拥有管理员权限的远程认证用户读取或写入任意文件，并发起拒绝服务攻击。

CVSS 6.8 · Medium Updated Nov 12, 2026

Possible ATT&CK Techniques 3 AI

T1069 · Permission Groups Discovery T1070 · Indicator Removal T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

N/A

Source: CVE Program / CVE List V5

Vulnerability Description

An improper neutralization of CRLF sequences vulnerability in the SNMP API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users with administrator privileges to read or write arbitrary files and conduct denial-of-service attacks.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

对CRLF序列的转义处理不恰当(CRLF注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Synology	DiskStation Manager (DSM)	7.4.1 ~ 7.4.1-90080-1	-

II. Public POCs for CVE-2026-86343

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-86343

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Other References for CVE-2026-86343 (1)

https://www.synology.com/en-global/security/advisory/Synology_SA_26_18

https://www.cve.org/CVERecord?id=CVE-2026-86343

Same Patch Batch · Synology · 2026-11-12 · 27 CVEs total

CVE-2026-76954	9.8 CRITICAL	Synology DSM 7.x Auth API SQL 注入漏洞
CVE-2026-13672	8.8 HIGH	群晖 DSM 7.3/7.4 SSOAuth 任意文件读写漏洞
CVE-2026-18792	8.8 HIGH	Synology DSM 7.3.2 前共享 API 路径遍历漏洞
CVE-2026-74857	8.8 HIGH	Synology DSM 7.3.2 前认证漏洞可读写文件
CVE-2026-85101	8.6 HIGH	Synology DSM rsync 认证绕过漏洞
CVE-2026-18596	8.1 HIGH	Synology DSM 7.4.1 前 OTP 认证绕过漏洞
CVE-2026-19048	8.1 HIGH	Synology DSM 7.4 前版本 thumb 任意文件写入漏洞
CVE-2026-81584	8.1 HIGH	Synology DSM 7.3/7.4 User API SQL 注入漏洞
CVE-2026-18633	7.5 HIGH	Synology DSM 7.3/7.4 nfsd 未初始化指针导致拒绝服务
CVE-2026-75785	7.2 HIGH	Synology DSM 7.3.2 前版本 VPN API 命令注入漏洞
CVE-2026-15198	6.5 MEDIUM	Synology DSM 7.3/7.4 Webdav API 认证绕过漏洞
CVE-2026-16550	6.5 MEDIUM	Synology DSM 7.3/7.4 媒体解析器路径控制漏洞
CVE-2026-87801	6.5 MEDIUM	Synology DSM 7.4.1 前 API 敏感信息插入漏洞
CVE-2026-15201	5.9 MEDIUM	Synology DSM 证书验证漏洞允许文件读写
CVE-2026-13656	5.4 MEDIUM	Synology DSM 7.3/7.4 音频播放器输入过滤漏洞
CVE-2026-19833	5.4 MEDIUM	Synology DSM 7.3/7.4 ACL API 缺失授权漏洞
CVE-2026-81557	5.4 MEDIUM	Synology DSM 7.3/7.4 DSMNotify 输入处理漏洞
CVE-2026-92379	5.4 MEDIUM	Synology DSM 7.3.2/7.4.1 通知 API 文件读写漏洞
CVE-2026-124993	5.3 MEDIUM	Synology DSM 7.3/7.4 安全顾问授权漏洞
CVE-2026-85098	5.3 MEDIUM	Synology DSM 7.3.2/7.4.1 synoscgi 断言漏洞

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: DiskStation Manager (DSM)

Same vendor: Synology

Same weakness: CWE-93