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CVE-2026-86060— SSH session privilege manipulation via a crafted username in Mikrotik RouterOS

Quick assessment

Affected
Mikrotik RouterOS
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MikroTik routeros是拉脱维亚MikroTik公司的一款网络操作系统软件。 MikroTik routeros 6.0.0至6.49.21之前版本、7.0.0至7.23.4之前版本和7.24至7.24.2之前版本存在命令注入漏洞，该漏洞源于SSH登录路径中的参数处理缺陷，涉及以禁止字符开头的用户名，可能允许更改受信任的RouterOS策略掩码，导致权限提升。利用该漏洞需要未经身份验证的SSH会话到达RouterOS登录助手。

CVSS 9.2 · Critical KEV EPSS 6.39% · P94

Public Exploits 1

ExploitDB · 1 EDB-52683 [remote]

Affected Version Matrix 3

VendorProduct Version RangeStatus
Mikrotik RouterOS 7.24< 7.24.2 affected
7.0.0< 7.23.4 affected
6.0.0< 6.49.21 affected
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I. Basic Information for CVE-2026-86060

Vulnerability Information
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Vulnerability Title
SSH session privilege manipulation via a crafted username in Mikrotik RouterOS
Source: CVE Program / CVE List V5
Vulnerability Description
RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited character, allowing for the trusted RouterOS policy mask to be changed, leading to privilege escalation. Exploitation requires an unauthenticated SSH session to reach the RouterOS login helper.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
MikroTik routeros 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MikroTik routeros是拉脱维亚MikroTik公司的一款网络操作系统软件。 MikroTik routeros 6.0.0至6.49.21之前版本、7.0.0至7.23.4之前版本和7.24至7.24.2之前版本存在命令注入漏洞，该漏洞源于SSH登录路径中的参数处理缺陷，涉及以禁止字符开头的用户名，可能允许更改受信任的RouterOS策略掩码，导致权限提升。利用该漏洞需要未经身份验证的SSH会话到达RouterOS登录助手。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mikrotik RouterOS 7.24 ~ 7.24.2 -

II. Public POCs for CVE-2026-86060

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III. Intelligence Information for CVE-2026-86060

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Security Blog Posts for CVE-2026-86060 (3)

Vendor Pages for CVE-2026-86060 (4)

Same Patch Batch · Mikrotik · 2026-09-05 · 6 CVEs total

CVE-2026-67276 9.2 CRITICAL SSH user impersonation possible in Mikrotik RouterOS
CVE-2026-67277 8.8 HIGH Kernel memory disclosure and denial of service in MikroTik RouterOS btest service
CVE-2026-67281 8.7 HIGH Unauthenticated file read in Mikrotik RouterOS
CVE-2026-67279 6.9 MEDIUM SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS
CVE-2026-67278 6.3 MEDIUM TLS server impersonation possible in Mikrotik RouterOS

IV. Related Vulnerabilities

Same product: RouterOS
Same vendor: Mikrotik
Same weakness: CWE-88

V. Comments for CVE-2026-86060

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