CVE-2022-20705
Published: 10 February 2022
Summary
CVE-2022-20705 is a critical-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Cisco Rv340 Firmware. Its CVSS base score is 10.0 (Critical).
Operationally, ranked in the top 0.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-20705 encompasses multiple vulnerabilities, primarily stack-based buffer overflows tracked under CWE-121 and CWE-787, affecting Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers. These flaws carry a CVSS 3.1 score of 10.0 and can result in arbitrary code execution, privilege elevation, command execution, authentication bypass, execution of unsigned software, or denial of service.
Remote attackers can exploit the issues over the network without authentication or user interaction, leveraging the routers' exposed management interfaces to achieve full device compromise or service disruption.
The Cisco Security Advisory at tools.cisco.com provides official guidance and patches for the affected RV series models, while additional technical details appear in Zero Day Initiative advisories ZDI-22-409, ZDI-22-410, and ZDI-22-415 along with public exploit references on Packet Storm.
The associated EPSS score remains elevated, with a current value of 0.8021 and a recorded peak of 0.8186.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-25955
Vulnerability details
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…
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software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.