Quick answers
- Is CVE-2026-118633 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118633 being exploited in the wild.
- How severe is CVE-2026-118633?
- High severity, with a CVSS score of 8.1, published 28 October 2026.
- Which products and versions are affected?
- Sophos UTM all versions.
- Is there a fix for CVE-2026-118633?
- No fixed version is recorded yet. Customers still using Email Protection features on UTM should upgrade to a supported version of Sophos Firewall and apply the patch manually as UTM is end-of-life; no workaround is available for the vulnerability itself.</anigation> </invoke> If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-118633 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-118633?
- Check whether you run Sophos UTM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
Customers still using Email Protection features on UTM should upgrade to a supported version of Sophos Firewall and apply the patch manually as UTM is end-of-life; no workaround is available for the vulnerability itself.</anigation> </invoke>
Technical details
A path traversal vulnerability in Sophos UTM's email proxy component allows unauthenticated remote code execution as root through a race condition. The attacker must sustain repeated attacks for several minutes when email proxy scanning is active. The vulnerability results in arbitrary command execution with root privileges; no fix is available for end-of-life UTM, though Sophos recommends upgrading to supported versions like Sophos Firewall.
Affected products
- Sophos UTM all versions
Timeline
- 2026-10-28: disclosed