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PatchSiren cyber security CVE debrief

CVE-2019-15271 Cisco CVE debrief

CVE-2019-15271 is a Cisco RV Series Routers deserialization of untrusted data vulnerability. CISA lists it in the Known Exploited Vulnerabilities catalog, which means it should be treated as an active defensive priority. The supplied record directs defenders to apply updates per vendor instructions.

Vendor
Cisco
Product
RV Series Routers
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2022-06-08
Original CVE updated
2022-06-08
Advisory published
2022-06-08
Advisory updated
2022-06-08

Who should care

Organizations that operate Cisco RV Series Routers, especially teams responsible for perimeter appliances, network infrastructure, vulnerability management, and patching.

Technical summary

The vulnerability is described at a high level as a deserialization of untrusted data issue affecting Cisco RV Series Routers. The supplied sources do not provide additional technical detail such as attack vector, authentication requirements, or affected firmware versions. CISA’s KEV entry indicates the issue is known to be exploited and recommends applying vendor updates.

Defensive priority

High. Because this CVE is included in CISA’s Known Exploited Vulnerabilities catalog, remediation should be prioritized over routine backlog items and handled according to vendor guidance.

Recommended defensive actions

  • Review Cisco’s guidance for CVE-2019-15271 and apply the vendor-recommended updates as soon as possible.
  • Inventory Cisco RV Series Routers across the environment so exposure can be confirmed quickly.
  • Prioritize patching or mitigation for any internet-facing or broadly reachable devices.
  • Track remediation against the CISA KEV due date of 2022-06-22 in the supplied timeline.
  • Validate that any updated devices remain stable and that configuration backups are current before maintenance.

Evidence notes

Evidence is limited to the supplied official metadata and references: the CVE record, NVD detail page, and CISA KEV entry. The source corpus identifies the issue as a Cisco RV Series Routers deserialization of untrusted data vulnerability and marks it as known exploited. No CVSS score or deeper technical details were provided in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2019-15271 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2019-15271

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

  • CVE-2019-15271 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2019-15271

    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.