CVE-2022-20700VulnerabilityPublished 03/03/2022Updated 10/24/2026

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

Affects Cisco Small Business RV160, RV260, RV340, and RV345 Series RoutersSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/03/2022
KEV deadline: 03/17/2022
EPSS: 5.7% chance of exploitation in 30 days – higher than 92% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2022-20700 (opens in a new tab)

Description

CVE-2022-20700 is a stack-based buffer overflow vulnerability affecting Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers. This flaw allows attackers to execute arbitrary code, elevate privileges, bypass authentication and authorization, run unsigned software, or cause denial of service. The vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

This vulnerability in Cisco Small Business RV Series Routers involves a stack-based buffer overflow (CWE-121) that can be exploited to perform multiple malicious actions including arbitrary code execution, privilege escalation, authentication bypass, execution of unsigned software, and denial of service. The affected products are the RV160, RV260, RV340, and RV345 Series Routers. Exploitation has been observed in the wild, indicating active threat. No patch or remediation details are provided in the input data.

Impact

Successful exploitation can lead to full compromise of affected routers, allowing attackers to execute arbitrary code, elevate privileges, bypass security controls, and disrupt service availability. This poses a significant risk to network security and operational continuity for organizations using these devices.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes are available, monitor Cisco advisories closely and consider implementing network-level protections to limit exposure of affected devices.

Weaknesses

CWE-121Stack-based Buffer Overflow (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:41:35 UTC

Weaknesses

References

Related threats