Cisco Small Business RV Series Routers Vulnerabilities
Description
Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Improper certificate validation in Cisco RV340 series firmware update allows network-adjacent attackers to execute arbitrary code as root.
Vulnerability
CVE-2022-20704 is an improper certificate validation vulnerability in the firmware update mechanism of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers [1][2]. When the device downloads a firmware image over HTTPS, it fails to properly validate the certificate presented by the server, allowing an attacker to substitute a malicious firmware file [2].
Exploitation
An attacker must be on the same network segment as the target router (network-adjacent) [2]. User interaction is required: an administrator must initiate a firmware update while the attacker can intercept or spoof the HTTPS connection [2]. The attacker can serve a crafted firmware update with an invalid certificate, which the router will accept due to the validation flaw, leading to arbitrary code execution.
Impact
Successful exploitation allows the attacker to execute arbitrary code with root privileges on the affected device [2]. This gives full control over the router, potentially leading to denial of service, information disclosure, or further network compromise.
Mitigation
Cisco has released fixed firmware versions; administrators should update to the latest recommended release as specified in the Cisco Security Advisory [1]. No workaround is available. The vulnerability is not known to be listed in CISA's Known Exploited Vulnerabilities catalog.
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: n/a
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6Dmitrevendor-advisoryx_refsource_CISCO
- www.zerodayinitiative.com/advisories/ZDI-22-413/mitrex_refsource_MISC
News mentions
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