Security Resilience

CVE-2024-20252

CSRF in Cisco Expressway ≤ 15.0

CSRF
Published
07 February 2024
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v3.1 9.6
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0085 57th percentile
Risk Priority 75 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

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 Security Account Manager (T1003.002); ranked in the top 43% 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)

A01:2025 Broken Access Control

EU & UK References

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…

more

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)
CWE-352

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1003.007 Proc Filesystem Credential Access
Adversaries may gather credentials from the proc filesystem or `/proc`.
attack.mitre.org →
T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
T1016.002 Wi-Fi Discovery Discovery
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-20255Same product: Cisco Expressway
CVE-2024-20254Same product: Cisco Expressway
CVE-2024-20486Same vendor: Cisco
CVE-2023-20113Same vendor: Cisco
CVE-2025-20326Same vendor: Cisco
CVE-2024-20368Same vendor: Cisco
CVE-2024-20421Same vendor: Cisco
CVE-2023-20221Same vendor: Cisco
CVE-2024-20281Same vendor: Cisco
CVE-2023-20180Same vendor: Cisco

Affected Assets

cisco
expressway
≤ 15.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.3.2
  • V3.5.1
  • V10.2.1

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement partial match

Access enforcement requires verifying that state-changing requests originate from the authenticated user rather than a forged cross-site source.

SC-23 Session Authenticity partial match

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.

PR.PS-06 partial match
blocks

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.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References