What is CVE-2026-20230?

CVE-2026-20230 is a high-severity vulnerability in Cisco Unified Communications Manager, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-06-03.

How severe is CVE-2026-20230?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2026-20230 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Cisco Unified Communications Manager

CVE-2026-20230

A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forger…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Cisco Unified Communications Manager — versions N/A

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

HORKimhab/CVE-2026-20230

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20230?: CVE-2026-20230 is a high-severity vulnerability in Cisco Unified Communications Manager, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-06-03.
How severe is CVE-2026-20230?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2026-20230 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.