Unauthenticated root RCE against a perimeter UTM appliance (Sophos UTM) can lead to full network compromise and service disruption across many organizations.
CVE-2026-118633
Unauthenticated path traversal -> root RCE on Sophos UTM (email proxy scanning).
Is CVE-2026-118633 being exploited?
Not confirmed. CVE-2026-118633 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-118633?
CVE-2026-118633 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-118633?
Yes. A fix has been recorded for CVE-2026-118633. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-118633 affect?
CVE-2026-118633 affects Sophos UTM (all versions), Email proxy with scanning enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-118633?
Install Sophos patch immediately; if not possible disable email proxy scanning or isolate UTM.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote root code execution via path traversal and race condition in email proxy; attackers can take full control of the appliance and network.
Immediate action required
- affected<= 9.724
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.