Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HSummary
CVE-2024-20252 is a critical-severity CSRF (CWE-352) vulnerability in Cisco Expressway. Its CVSS base score is 9.6 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 45% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SC-23 (Session Authenticity) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2024-20252 is a cross-site request forgery vulnerability (CWE-352) affecting Cisco Expressway Series devices, specifically Expressway-C and Expressway-E, as well as Cisco TelePresence Video Communication Server (VCS). The flaw enables an unauthenticated remote attacker to trigger arbitrary actions on the device through maliciously crafted web requests.
An attacker can exploit the issue by luring an authenticated administrator into interacting with attacker-controlled content, resulting in unauthorized configuration changes or other actions with high impact to confidentiality, integrity, and availability. The CVSS 9.6 score reflects network attack vector, low complexity, no required privileges, and required user interaction that nonetheless yields critical scope.
EPSS for the CVE rose from low values to a peak of 0.0736 on 2025-12-11 before receding to the current 0.0338, indicating a temporary increase in observed exploitation interest after disclosure. The primary Cisco advisory at the referenced URL contains official mitigation guidance.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-17967
Vulnerability Data
Multiple vulnerabilities in Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to conduct cross-site request forgery (CSRF) attacks that perform arbitrary actions on an affected device. Note: "Cisco Expressway Series" refers to…
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Cisco Expressway Control (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices. For more information about these vulnerabilities, see the Details ["#details"] section of this advisory.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V3.3.2V3.5.1V10.2.1
Mitigating Controls (NIST 800-53 r5) AI
Access enforcement requires verifying that state-changing requests originate from the authenticated user rather than a forged cross-site source.
Protecting session authenticity prevents attackers from replaying or forging authenticated requests via the victim's browser.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require anti-CSRF controls such as tokens or SameSite attributes.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
By denying access to phishing or malicious sites, the control lowers the likelihood that a user will be tricked into submitting a forged request that performs an unintended action on another site.
Contextual intelligence about emerging CSRF toolkits can be translated into updated anti-CSRF token or same-site policy configurations across applications.