How severe is CVE-2024-20391?

CVE-2024-20391 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-20391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-20391?

CVE-2024-20391 affects Cisco Secure Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-20391?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-20391 have an EU (EUVD) identifier?

Yes. CVE-2024-20391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18106.

When was CVE-2024-20391 published?

CVE-2024-20391 was published on 2024-05-15 and last updated on 2026-06-17.

CVE-2024-20391

CVE-2024-20391 is a medium-severity vulnerability in Cisco Secure Client with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18106
Weakness: CWE-306
Affected product: Cisco Secure Client
Published: 2024-05-15
Last modified: 2026-06-17

Description

A vulnerability in the Network Access Manager (NAM) module of Cisco Secure Client could allow an unauthenticated attacker with physical access to an affected device to elevate privileges to SYSTEM. This vulnerability is due to a lack of authentication on a specific function. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges on an affected device.

Frequently asked questions

What is CVE-2024-20391?: A vulnerability in the Network Access Manager (NAM) module of Cisco Secure Client could allow an unauthenticated attacker with physical access to an affected device to elevate privileges to SYSTEM. This vulnerability is due to a lack of authentication on a specific function. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges on an affected device.
How severe is CVE-2024-20391?: CVE-2024-20391 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-20391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20391?: CVE-2024-20391 affects Cisco Secure Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-20391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-20391 have an EU (EUVD) identifier?: Yes. CVE-2024-20391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18106.
When was CVE-2024-20391 published?: CVE-2024-20391 was published on 2024-05-15 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-secure-nam-priv-esc-szu2vYpZ

Affected products (1)

cpe:2.3:a:cisco:secure_client:*:*:*:*:*:*:*:*

More vulnerabilities in Cisco Secure Client

CVE-2024-20337 — High (CVSS 8.2): A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote…
CVE-2023-20178 — High (CVSS 7.8): A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco…
CVE-2024-3661 — High (CVSS 7.6): DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security…
CVE-2024-20338 — High (CVSS 7.3): A vulnerability in the ISE Posture (System Scan) module of Cisco Secure Client for Linux could allow an authenticated,…
CVE-2025-20206 — High (CVSS 7.1): A vulnerability in the interprocess communication (IPC) channel of Cisco Secure Client for Windows could allow an…
CVE-2023-20241 — Medium (CVSS 5.5): Multiple vulnerabilities in Cisco Secure Client Software, formerly AnyConnect Secure Mobility Client, could allow an…

All CVEs affecting Cisco Secure Client →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-54309 — Critical (CVSS 10.0): n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP…
CVE-2026-50242 — Critical (CVSS 10.0): In JetBrains Hub before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429…
CVE-2026-49257 — Critical (CVSS 10.0): mcp-pinot is a Python-based Model Context Protocol (MCP) server for interacting with Apache Pinot. In versions 3.0.1…
CVE-2026-46846 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46803 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46800 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites).…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →