What’s Vulnerable › Vulnerabilities

CVE-2020-3453: Cisco Small Business RV340 Series Routers Command Injection and Remote Code Execution Vulnerabilities

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-04 · updated 2026-06-17
• Weakness: CWE-119

Description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV340 Series Routers could allow an authenticated, remote attacker with administrative credentials to execute arbitrary commands on the underlying operating system (OS) as a restricted user. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Rv340 Firmware: before 1.0.03.19 — fixed in 1.0.03.19
• Cisco Rv340W Firmware: before 1.0.03.19 — fixed in 1.0.03.19
• Cisco Rv345 Firmware: before 1.0.03.19 — fixed in 1.0.03.19
• Cisco Rv345P Firmware: before 1.0.03.19 — fixed in 1.0.03.19

How to fix

Upgrade to a fixed version: Cisco Rv340 Firmware 1.0.03.19; Cisco Rv340W Firmware 1.0.03.19; Cisco Rv345 Firmware 1.0.03.19; Cisco Rv345P Firmware 1.0.03.19. Check the vendor advisory for mitigations.

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-osinj-rce-pwTkPCJv
• https://www.zerodayinitiative.com/advisories/ZDI-20-1101/
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-osinj-rce-pwTkPCJv
• https://www.zerodayinitiative.com/advisories/ZDI-20-1101/

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