Widely used Cisco Unified CM; unauthenticated SSRF enabling OS file write and root access; could disrupt enterprise communications.
CVE-2026-20230
Unauthenticated SSRF in Cisco Unified CM could write files and escalate to root.
Is CVE-2026-20230 being exploited?
Yes. CVE-2026-20230 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-20230?
CVE-2026-20230 is rated High with a CVSS score of 8.6. 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-2026-20230?
Yes. A fix has been recorded for CVE-2026-20230. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20230 affect?
CVE-2026-20230 affects Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20230?
Patch when available; disable WebDialer if not needed; monitor for SSRF activity.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated SSRF could write OS files, enabling privilege escalation to root when WebDialer is enabled.
Immediate action required
- affected14
- affected14SU1
- affected14SU2
- affected14SU3
- affected15
- affected15SU1
- affected14SU4
- affected14SU4a
- affected15SU1a
- affected15SU2
- affected15.0.1.13010-1
- affected15.0.1.13011-1
- affected15.0.1.13012-1
- affected15.0.1.13013-1
- affected15.0.1.13014-1
- affected15.0.1.13015-1
- affected15.0.1.13016-1
- affected15.0.1.13017-1
- affected15SU3a
- affected14SU5
- affected15SU4
- affected15SU4a
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.