CVE-2021-1520: cisco cisco small business rv series router firmware Write-what-where Condition

Vulnerability summary

CVE-2021-1520 is a high (CVSS 7.2) Write-what-where Condition vulnerability in cisco cisco small business rv series router firmware. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.2% of scored vulnerabilities.

Timeline

1. 06-05-2021
   PublishedVulnerability first disclosed.
2. 08-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the internal message processing of Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, local attacker to run arbitrary commands with root privileges on the underlying operating system (OS). This vulnerability exists because an internal messaging service does not properly sanitize input. An attacker could exploit this vulnerability by first authenticating to the device and then sending a crafted request to the internal service. A successful exploit could allow the attacker to run arbitrary commands with root privileges on the underlying OS. To exploit this vulnerability, the attacker must have valid Administrator credentials for the device.

• CWE-123Write-what-where ConditionAny condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow.