CVE-2026-118633

Published Oct 28, 2026

Last updated 17 hours ago

CVSS critical 9.2

Overview

Description
A path traversal vulnerability allows a remote unauthenticated attacker to execute arbitrary code as root in Sophos UTM (all versions) after winning a race condition by sustaining repeated attacks for a few minutes when the email proxy is used with scanning enabled. Sophos UTM is end-of-life and the patch must be installed manually.
Source
security-alert@sophos.com
NVD status
Awaiting Analysis

Insights

Analysis from the Intruder Security Team
Published Oct 29, 2026 Updated Oct 29, 2026

This vulnerability allows a remote attacker who can determine that an email server is using Sophos UTM's email scanning feature to obtain code execution on the UTM appliance as admin/root.

The patch must be applied manually and this should be done as soon as possible. As a mitigation if you are unable to patch immediately, you should disable the email scanning feature.

Risk scores

CVSS 4.0

Type
Secondary
Base score
9.2
Impact score
-
Exploitability score
-
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity
CRITICAL

CVSS 3.1

Type
Secondary
Base score
8.1
Impact score
5.9
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

security-alert@sophos.com
CWE-35

Social media

Hype score
Not currently trending

  1. 【Sophos UTM】CVE-2026-118633（CVSS 9.2）メールプロキシ経由で未認証root RCE。全版対象。手動パッチ適用とSophos Firewall移行を。 Sophos UTM CVE-2026-118633: pre-auth root RCE via email proxy. Apply manual patch; migrate to Sophos Firewall. https:/

    @ZeroKaiLabs

    29 Oct 2026

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References

Sources include official advisories and independent security research.