# CVE-2022-20703: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Source: https://junglewise.ai/threats/cve-2022-20703-cisco-small-business-rv-series-routers-stack-based-buffer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-20703 · Severity: critical · CVSS 10 · Exploited in the wild · Published 2022-03-03

A stack-based buffer overflow vulnerability in Cisco Small Business RV Series routers allows a remote, unauthenticated attacker to execute arbitrary code, elevate privileges, or cause a denial of service. The flaw can also be leveraged to bypass authentication protections and run unsigned software.

Technologies: [Cisco RV160](https://junglewise.ai/threats/technologies/rv160), [Cisco RV260](https://junglewise.ai/threats/technologies/rv260), [Cisco RV340](https://junglewise.ai/threats/technologies/rv340), [Cisco RV345 Series Routers](https://junglewise.ai/threats/technologies/rv345-series-routers), [Cisco Small Business Rv160](https://junglewise.ai/threats/technologies/small-business-rv160). Vendors: [Cisco](https://junglewise.ai/threats/vendors/cisco).

## Quick answers

**Is CVE-2022-20703 exploited in the wild?** Yes. CVE-2022-20703 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2022-20703?** Critical severity, with a CVSS score of 10, published 3 March 2022.

**Which products and versions are affected?** Cisco RV160 Series Routers; Cisco RV260 Series Routers; Cisco RV340 Series Routers from (including) 1.0.03.24; Cisco RV345 Series Routers from (including) 1.0.03.24.

**Is there a fix for CVE-2022-20703?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2022-20703 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-20703?** Check whether you run Cisco RV160, Cisco RV260, Cisco RV340 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Cisco RV160 Series Routers
- Cisco RV260 Series Routers
- Cisco RV340 Series Routers from (including) 1.0.03.24
- Cisco RV345 Series Routers from (including) 1.0.03.24

## Timeline

- 2022-03-03: disclosed
- 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-03-03: advisory

## Related threats

- [Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2022-20699-cisco-small-business-rv-series-routers-stack-based-buffer)
- [Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2022-20701-cisco-small-business-rv-series-routers-stack-based-buffer)
- [Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2022-20708-cisco-small-business-rv-series-routers-stack-based-buffer)
- [Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability](https://junglewise.ai/threats/cve-2022-20700-cisco-small-business-rv-series-routers-stack-based-buffer)