CVE-2022-20701: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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).
CSIRTS triage
- What
- A stack-based buffer overflow vulnerability could allow an attacker to execute arbitrary code or cause a denial of service.
- Who is affected
- Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers are affected.
- Urgency
- Immediate remediation is necessary due to active exploitation and critical severity.
- Action
- Update to the latest firmware for the affected router models.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-20701
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2022-20701Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 95% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2022-20701 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Cisco Small Business
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedCVE-2023-20118: Cisco Small Business RV Series Routers Command Injection Vulnerabilitycisa-kev · 2025-03-03
- criticalexploitedCVE-2019-1652: Cisco Small Business Routers Improper Input Validation Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2022-20700: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2022-20708: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2022-20703: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2022-20699: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerabilitycisa-kev · 2022-03-03
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