Known exploited · Cisco
CVE-2022-20708: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability
What it is
A vulnerability 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, or cause a denial of service (DoS).
- Vendor
- Cisco
- Product
- Small Business RV160, RV260, RV340, and RV345 Series Routers
- Added to KEV
- March 3, 2022
- CISA due date
- March 17, 2022
- Ransomware use
- Unknown
What CISA requires
Apply updates per vendor instructions.
Forensic triage
No
What to do now
- Find every instance of Small Business RV160, RV260, RV340, and RV345 Series Routers you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before March 17, 2022 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
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Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.