CVE-2021-1520
6.7 · MEDIUMOverview
CVE-2021-1520 is a medium-severity vulnerability affecting cisco rv340_firmware. It was published on May 6, 2021 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from cisco. Update rv340_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | rv340_firmware | >= 0, < 1.0.03.21 | Affected |
| cisco | rv340w_firmware | >= 0, < 1.0.03.21 | Affected |
| cisco | rv345_firmware | >= 0, < 1.0.03.21 | Affected |
| cisco | rv345p_firmware | >= 0, < 1.0.03.21 | Affected |
Frequently Asked Questions
What is CVE-2021-1520?
CVE-2021-1520 is a medium-severity vulnerability affecting cisco rv340_firmware. It was published on May 6, 2021 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
How severe is CVE-2021-1520?
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-1520?
Check the references section for vendor advisories and patches from cisco. Update rv340_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-1520?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-1520 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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