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PatchSiren cyber security CVE debrief

CVE-2022-20700 Cisco CVE debrief

CVE-2022-20700 is a stack-based buffer overflow affecting Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers. CISA listed it in the Known Exploited Vulnerabilities catalog on 2022-03-03 and set a remediation due date of 2022-03-17, so organizations using these routers should treat it as an urgent patching item.

Vendor
Cisco
Product
Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS
CRITICAL 10
CISA KEV
Listed
Original CVE published
2022-03-03
Original CVE updated
2022-03-03
Advisory published
2022-03-03
Advisory updated
2022-03-03

Who should care

Network administrators, security teams, and IT staff responsible for Cisco Small Business RV160, RV260, RV340, or RV345 routers should prioritize this CVE. It is especially important for devices exposed to the internet or supporting business-critical connectivity.

Technical summary

The available source corpus identifies the issue as a stack-based buffer overflow in Cisco Small Business RV series routers. The CISA KEV entry confirms the vulnerability is known to be exploited in the wild and directs defenders to apply updates per vendor instructions. No additional technical exploitation details are included in the supplied sources.

Defensive priority

High. This is a KEV-listed vulnerability with a specified remediation deadline, which makes it an urgent patch-and-verify item for any affected deployment.

Recommended defensive actions

  • Inventory Cisco Small Business RV160, RV260, RV340, and RV345 routers in your environment.
  • Check Ciscos official guidance and apply the vendor-recommended firmware or updates as soon as possible.
  • Prioritize internet-facing or business-critical routers first.
  • If immediate patching is not possible, reduce exposure by restricting administrative access and limiting unnecessary network reachability.
  • Verify remediation before the 2022-03-17 KEV due date and document completion.

Evidence notes

The CVE record and NVD link identify the vulnerability by name, while the CISA KEV source lists the affected Cisco product family, marks it as known exploited, and provides the remediation due date. The supplied timeline shows both publication and modification on 2022-03-03, which should be treated as the CVE date context for this debrief.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-20700 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-20700

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2022-20700 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-20700

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.