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CVE-2022-20703 Cisco CVE debrief

CVE-2022-20703 is a Cisco Small Business RV Series Routers stack-based buffer overflow vulnerability that CISA has added to its Known Exploited Vulnerabilities catalog. Because it is on the KEV list, defenders should treat it as an actively exploited issue and prioritize remediation on affected RV160, RV260, RV340, and RV345 Series Routers.

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 and security teams responsible for Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers, especially organizations exposing router management surfaces or depending on these devices for edge connectivity.

Technical summary

The vulnerability is described by Cisco and CISA as a stack-based buffer overflow affecting Cisco Small Business RV Series Routers. The supplied source corpus does not include deeper technical detail, but CISA’s KEV designation indicates the issue has been observed in real-world exploitation and should be remediated according to vendor guidance.

Defensive priority

High. CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-03-03, with a remediation due date of 2022-03-17, signaling urgent attention for affected environments.

Recommended defensive actions

  • Apply Cisco updates and remediation steps for the affected RV series routers as directed by the vendor.
  • Inventory Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers to determine exposure and confirm firmware levels.
  • Prioritize any internet-facing or remotely managed devices for immediate patching.
  • Verify that configuration, access, and management exposure are limited until remediation is complete.
  • Monitor Cisco and CISA advisories for any follow-up guidance related to CVE-2022-20703.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the linked official records. The corpus identifies the vulnerability as a stack-based buffer overflow in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers, with CISA KEV dateAdded 2022-03-03 and dueDate 2022-03-17. No CVSS score was provided in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-20703 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-20703

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

  • CVE-2022-20703 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-20703

    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.