PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-21715 Microsoft CVE debrief

CVE-2023-21715 is a Microsoft Office Publisher security feature bypass vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2023-02-14. Because it is KEV-listed, defenders should treat it as a priority patching item and follow Microsoft’s update guidance for affected Office installations, especially systems with Publisher installed.

Vendor
Microsoft
Product
Office
CVSS
HIGH 7.3
CISA KEV
Listed
Original CVE published
2023-02-14
Original CVE updated
2023-02-14
Advisory published
2023-02-14
Advisory updated
2023-02-14

Who should care

Security and IT teams responsible for Microsoft Office deployments, especially endpoints that include Microsoft Publisher. Vulnerability management, patch management, and incident response teams should also track this CVE because CISA has marked it as known exploited.

Technical summary

The available source data identifies the issue as a security feature bypass in Microsoft Office Publisher. CISA’s KEV entry confirms the vulnerability is known exploited and directs organizations to apply updates per vendor instructions. The supplied corpus does not include additional technical behavior, affected versions, or exploitation mechanics beyond the CVE title and KEV designation.

Defensive priority

High: CISA KEV-listed vulnerability with a required remediation window, so it should be prioritized in patching and exposure tracking.

Recommended defensive actions

  • Apply Microsoft updates for CVE-2023-21715 on affected systems as soon as possible.
  • Confirm which endpoints and virtual desktops have Microsoft Publisher installed.
  • Verify patch compliance against the CISA KEV due date of 2023-03-07.
  • Use Microsoft’s official vulnerability guidance to validate remediation status.
  • Monitor for any affected systems that could not be patched promptly and isolate them where appropriate.

Evidence notes

CISA’s Known Exploited Vulnerabilities feed lists this CVE as 'Microsoft Office Publisher Security Feature Bypass Vulnerability' with dateAdded 2023-02-14 and dueDate 2023-03-07, and the metadata instructs organizations to apply updates per vendor instructions. The supplied source metadata also points to Microsoft’s update guide and the NVD detail page as references. No additional exploitation details, impact scope, or version-specific data were included in the provided corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-21715 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-21715

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

  • CVE-2023-21715 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-21715

    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.