CVE-2019-1652: Cisco Small Business Routers Improper Input Validation Vulnerability

Vulnerability summary

CVE-2019-1652 is a high (CVSS 9.0) Improper Input Validation vulnerability in Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers. It is known to be exploited: CISA lists it, first on 03-03-2022. EPSS estimates a 95.92% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 6 public exploits are recorded.

Timeline

1. 24-01-2019
   PublishedVulnerability first disclosed.
2. 03-03-2022
   Added to CISA KEVExploitedCisco Small Business Routers Improper Input Validation Vulnerability
3. 17-03-2022
   CISA remediation dueDeadline passedApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability in the web-based management interface of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers could allow an authenticated, remote attacker with administrative privileges on an affected device to execute arbitrary commands. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious HTTP POST requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux shell as root. Cisco has released firmware updates that address this vulnerability.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.