Exploited CVEs / Cisco / CVE-2026-20045
CVE-2026-20045
Cisco Unified Communications Products Code Injection Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2026-02-11 (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, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2026-01-21.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2026-20045
Five Cisco collaboration products share this code injection flaw: Unified CM, Unified CM SME, Unified CM IM&P, Unity Connection, and Webex Calling Dedicated Instance, all rated Critical at CVSS 9.8. CISA confirmed exploitation on 2026-01-21 despite a modest 4% EPSS score, which points to targeted rather than opportunistic use. The breadth across the UC stack means one patch cycle has to cover voicemail, presence, and call control together.
Do this: Inventory all five affected Cisco UC products and schedule their updates as a single coordinated maintenance window.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-20045
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-20045
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: 2026-02-11 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2026-20045
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-2026-20045
Is CVE-2026-20045 actively exploited?
Yes. CVE-2026-20045 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-01-21, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 4.3%.
What is the CISA deadline and required action for CVE-2026-20045?
CISA set the federal (BOD 22-01) remediation due date at 2026-02-11, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2026-20045?
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-2026-20045?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-20045'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).
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