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Exploited vulnerability · CISA KEV

Is CVE-2022-20708 exploited? Yes: in CISA KEV since 3 Mar 2022

Gociux · Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-20708, Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, 21 days after it was published. It affects Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity10CVSS 3.1 · critical
US federal due17 Mar 2022BOD 22-01 deadline

What it is

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).

VendorCisco (103 exploited CVEs in KEV)
ProductSmall Business RV160, RV260, RV340, and RV345 Series Routers
VulnerabilityCisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability
WeaknessCWE-121
Published10 Feb 2022
Added to KEV3 Mar 2022
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for Small Business RV160, RV260, RV340, and RV345 Series Routers in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Feb 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

Other exploited CVEs in Small Business RV160, RV260, RV340, and RV345 Series Routers

References

Questions

Is CVE-2022-20708 being exploited?

Yes. CISA added CVE-2022-20708 to the Known Exploited Vulnerabilities catalog on 3 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-20708 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2022-20708?

Apply updates per vendor instructions. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Small Business RV160, RV260, RV340, and RV345 Series Routers and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Cisco scorecard · act-now radar.

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