CVE-2024-20439
Confirmed PUBLISHEDA vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a static administrative credential. This vulnerability is due to an undocumented static user credential for an administrative account. An attacker could exploit this vulnerability by using the static credentials to login to the affected system. A successful exploit could allow the attacker to login to the affected system with administrative rights over the CSLU application API.
- CVE Published
- Sep 04, 2024
- Exploitation Reported
- Mar 31, 2025
- CVSS
- 9.8 Critical
- EPSS
- 92.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| cisco |
cisco_smart_license_utility
|
2.1.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.0.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.2.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.1.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.0.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.2.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.1.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.0.0 |
Affected |
| cisco |
cisco_smart_license_utility
|
2.2.0 |
Affected |
| Cisco |
Cisco Smart License Utility
|
2.1.0 |
Affected |
| Cisco |
Cisco Smart License Utility
|
2.0.0 |
Affected |
| Cisco |
Cisco Smart License Utility
|
2.2.0 |
Affected |
CVE References
- cisco-sa-cslu-7gHMzWmw sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2025-03-31 00:00 UTC |
| The Shadowserver | 2026-06-09 00:00 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-20439.yaml | Apr 25, 2025 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2025-03-31 00:00:00 UTC · CISA
Proof of concept available
Recorded 2026-06-12 14:20:45 UTC · Nuclei Templates
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/206672 | Jun 02, 2025 |
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-20439.yaml | Apr 25, 2025 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:20 UTC about 1 month ago14:20 UTC · about 1 month ago
Public PoC available
Public proof-of-concept code published
-
00:00 UTC about 1 month ago00:00 UTC · about 1 month ago
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
09:39 UTC about 1 year ago09:39 UTC · about 1 year ago
Nessus plugin available
Scanner coverage available
-
00:00 UTC about 1 year ago00:00 UTC · about 1 year ago
Nuclei template available
Scanner coverage available
-
00:00 UTC over 1 year ago00:00 UTC · over 1 year ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
16:28 UTC almost 2 years ago16:28 UTC · almost 2 years ago
CVE published
Vulnerability disclosed publicly
-
15:08 UTC over 2 years ago15:08 UTC · over 2 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2024-20439
{
"cve_id": "CVE-2024-20439",
"title": "A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauth...",
"affected_vendor": "Cisco",
"affected_product": "Cisco Smart License Utility",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": 0.9201,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}