What is CVE-2022-20699?

CVE-2022-20699 is a critical-severity vulnerability in Cisco Small Business Rv Series Router Firmware, classified under Stack-based Buffer Overflow. CVSS score: 10.0/10. Published 2022-02-10.

How severe is CVE-2022-20699?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2022-20699 known to be exploited?

Yes. CVE-2022-20699 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 34 public proof-of-concept repositories are indexed.

Buffer overflow in Cisco Small Business Rv Series Router Firmware

CVE-2022-20699

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 a…

Vulnerability class: Buffer Overflow

EPSS: 0.894 (99.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Cisco Small Business Rv Series Router Firmware — versions n/a

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-03-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

20220203 Cisco Small Business RV Series Routers Vulnerabilities (vendor-advisory, x_refsource_CISCO)
www.zerodayinitiative.com/advisories/ZDI-22-414/ (x_refsource_MISC)
packetstormsecurity.com/files/167113/Cisco-RV340-SSL-VPN-Unauthenticated-Remote… (x_refsource_MISC)

Frequently asked questions

What is CVE-2022-20699?: CVE-2022-20699 is a critical-severity vulnerability in Cisco Small Business Rv Series Router Firmware, classified under Stack-based Buffer Overflow. CVSS score: 10.0/10. Published 2022-02-10.
How severe is CVE-2022-20699?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2022-20699 known to be exploited?: Yes. CVE-2022-20699 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 34 public proof-of-concept repositories are indexed.