Exploited CVEs / Cisco / CVE-2024-20439
CVE-2024-20439
Cisco Smart Licensing Utility Static Credential Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2025-04-21 (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 Smart Licensing Utility vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2025-03-31.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2024-20439
This is a hardcoded backdoor: Cisco Smart Licensing Utility ships with a static administrative credential that any unauthenticated remote attacker can use to log in and gain full admin access. Anyone running the standalone Smart Licensing Utility application is exposed, and with a 92% EPSS score plus confirmation in CISA KEV since 2025-03-31, this is being actively exploited in the wild rather than just theoretically vulnerable.
Do this: Identify all hosts running Cisco Smart Licensing Utility and patch to a fixed release immediately, since no configuration change removes the static credential.
AI-generated from public data, 2026-07-25. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2024-20439
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2024-20439
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: 2025-04-21 (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-2024-20439
The authoritative fix and affected-version list are published by the vendor. Find the Smart Licensing Utility advisory on Cisco Security Advisories (PSIRT).
Common questions about CVE-2024-20439
Is CVE-2024-20439 actively exploited?
Yes. CVE-2024-20439 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-03-31, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 92%.
What is the CISA deadline and required action for CVE-2024-20439?
CISA set the federal (BOD 22-01) remediation due date at 2025-04-21, 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-2024-20439?
The authoritative fix is in the vendor advisory: see Cisco Security Advisories (PSIRT) for the patched Smart Licensing Utility 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-2024-20439?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2024-20439'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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