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Vulnerability record · CVE-2024-20518 · published 2 October 2024

CVE-2024-20518: Cisco rv042 firmware stack-based buffer overflow vulnerability

Cisco · Rv042 Firmware

A vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, Administrator-level, remote attacker to execute arbitrary code as the root user. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.   This vulnerability is due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.

9.1 CVSS 3.1 Critical EPSS 0.61% · top 52.7% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
9.1CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, Administrator-level, remote attacker to execute arbitrary code as the root user. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.   This vulnerability is due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2019-1653Cisco RV320/RV325 router web interface improper access controlThe web-based management interface of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers has improper access controls for URLs, lettin…KEVEPSS 100%analysed7.2CVE-2023-20118Cisco Small Business RV Series Routers Command InjectionThe web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 routers fails to properly validate user inpu…KEVEPSS 54%analysed7.2CVE-2019-1652Cisco RV320/RV325 web interface command injectionThe web-based management interface of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers fails to properly validate user-supplied inpu…KEVEPSS 96%analysed9.8CVE-2023-20025Cisco rv016 firmware authentication bypass by spoofing vulnerabilityA vulnerability in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, and RV082 Routers could allow an unauthenticated,…EPSS 1.6%9.1CVE-2024-20520Cisco rv042 firmware stack-based buffer overflow vulnerabilityA vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, A…EPSS 0.61%9.1CVE-2024-20521Cisco rv042 firmware stack-based buffer overflow vulnerabilityA vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, A…EPSS 0.66%9.1CVE-2024-20519Cisco rv042 firmware stack-based buffer overflow vulnerabilityA vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, A…EPSS 0.61%8.1CVE-2019-1828Cisco rv320 firmware broken cryptographic algorithm vulnerabilityA vulnerability in the web-based management interface of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers could allow an unauthentic…EPSS 0.70%

Source: NIST National Vulnerability Database (record CVE-2024-20518), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.