Cyber Resilience

CVE-2024-20376

Memory Safety in Cisco Video Phone 8875 Firmware ≤ 2.3.1.0101

Published
01 May 2024
Modified
05 January 2026
Patch / advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0087 56th percentile
Risk Priority 59 floored blend · peak EPSS

Summary

CVE-2024-20376 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Cisco Video Phone 8875 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 44% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-15 (Development Process, Standards, and Tools) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a DoS condition. This vulnerability is due to insufficient validation of user-supplied input.…

more

An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
T1211 Exploitation for Stealth Stealth
Adversaries may exploit vulnerabilities to evade detection by hiding activity, suppressing logging, or operating within trusted or unmonitored components.
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-20357Same product: Cisco Ip Phone 6821
CVE-2023-20078Same product: Cisco Ip Phone 6841
CVE-2023-20079Same product: Cisco Ip Phone 6841
CVE-2023-20109Same vendor: Cisco
CVE-2024-20501Same vendor: Cisco
CVE-2024-20308Same vendor: Cisco
CVE-2023-20213Same vendor: Cisco
CVE-2025-20182Same vendor: Cisco
CVE-2023-31488Same vendor: Cisco
CVE-2024-20375Same vendor: Cisco

Affected Assets

cisco
video phone 8875 firmware
≤ 2.3.1.0101
cisco
ip phone 6821 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 6841 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 6851 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 6861 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 6871 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 7811 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 7821 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 7832 with multiplatform firmware
≤ 12.0.4
cisco
ip phone 7841 with multiplatform firmware
≤ 12.0.4
+8 more product configuration(s) — see NVD for full list

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

Developer testing and evaluation (including fuzzing and bounds checks) finds out-of-bounds write flaws before deployment.

Requiring documented secure-development standards and tools can mandate bounds-checked coding practices that avoid the weakness.

Input validation can structurally reject or sanitize data that would otherwise trigger an out-of-bounds write.

Memory-protection mechanisms limit the exploitability and blast radius of a successful out-of-bounds write.

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 mostly match
prevents

Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.

ID.RA-01 partial match
prevents

Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.

PR.PS-02 partial match
prevents

Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.

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.

finds

Security testing in development and acceptance can detect and prevent out-of-bounds write defects.

prevents

Secure development life cycle mandates practices that prevent out-of-bounds writes.

prevents

Application security requirements can specify bounds-checking and safe memory handling.

prevents

Secure architecture and engineering principles reduce the likelihood of buffer overflows.

prevents

Secure coding directly addresses out-of-bounds writes through language choice and coding standards.

prevents

Change management can enforce review gates that catch unsafe memory operations before deployment.

References