CVE-2022-20700 Cisco Small Business RV Series Routers Stack-based Buffer Overflow

Exploited in the wild Critical 10.0 Published 10 Feb 2022 Updated 21 Oct 2025

Attackers can execute arbitrary code, elevate privileges, and cause denial of service on Cisco Small Business RV Series Routers via memory corruption flaws.

Exploited in the wild: Since 3 Mar 2022
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-20700?

CVE-2022-20700 is a critical memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 10 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2022-20700?

It affects 9 products.

Products include Cisco Rv160 Firmware, Cisco Rv160w Firmware, Cisco Rv260 Firmware, Cisco Rv260p Firmware, Cisco Rv260w Firmware, Cisco Rv340 Firmware and 3 more.

How do I fix CVE-2022-20700?

No fix has been published for CVE-2022-20700 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Mar 2022.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2022-20700 being exploited?

Yes. Attackers have exploited CVE-2022-20700 in the wild since at least 3 Mar 2022.

Sources

Also known as GHSA-4jrj-gxg8-2frj.