Exploited CVEs / Cisco / CVE-2026-20230
CVE-2026-20230
Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2026-06-28 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Cisco Security Advisories (PSIRT), linked below.
Actively exploited Cisco Unified Communications Manager vulnerability, High severity, CVSS 8.6. Added to the CISA KEV catalog 2026-06-25.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2026-20230
An SSRF flaw in Cisco Unified Communications Manager lets an unauthenticated remote attacker write files to the underlying system, and with a 42% EPSS score it is being probed far more often than most KEV entries. CISA confirmed exploitation on 2026-06-25. Call managers sit at the heart of corporate telephony and often have broad internal network reach, so a foothold here spreads quickly.
Do this: Apply the Cisco fix to Unified CM and Unified CM SME nodes and restrict their web interfaces to management networks only.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-20230
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-20230
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-06-28 (past due).
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Official fix for CVE-2026-20230
The authoritative fix and affected-version list are published by the vendor. Find the Unified Communications Manager advisory on Cisco Security Advisories (PSIRT).
Common questions about CVE-2026-20230
Is CVE-2026-20230 actively exploited?
Yes. CVE-2026-20230 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-06-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 81%.
What is the CISA deadline and required action for CVE-2026-20230?
CISA set the federal (BOD 22-01) remediation due date at 2026-06-28, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
What fixes CVE-2026-20230?
The authoritative fix is in the vendor advisory: see Cisco Security Advisories (PSIRT) for the patched Unified Communications Manager versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-20230?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-20230's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
More exploited Cisco CVEs
The newest Cisco entries on the CISA KEV catalog:
All Cisco exploited CVEs on one page: Cisco vulnerabilities actively exploited.
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
