PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-36563 Microsoft CVE debrief

CVE-2023-36563 is a Microsoft WordPad information disclosure vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2023-10-10. Because it is in KEV, defenders should treat it as actively exploited risk rather than a theoretical issue. CISA’s required action is to apply vendor mitigations or discontinue use of the product if mitigations are unavailable.

Vendor
Microsoft
Product
WordPad
CVSS
MEDIUM 6.5
CISA KEV
Listed
Original CVE published
2023-10-10
Original CVE updated
2023-10-10
Advisory published
2023-10-10
Advisory updated
2023-10-10

Who should care

Security teams, Windows administrators, endpoint management teams, and any organization that still relies on Microsoft WordPad should prioritize this CVE, especially if they track CISA KEV remediation deadlines.

Technical summary

The supplied corpus identifies CVE-2023-36563 as an information disclosure issue in Microsoft WordPad and confirms it was added to CISA KEV on 2023-10-10 with a due date of 2023-10-31. No CVSS score was provided in the corpus. The available authoritative guidance in the source data is to apply Microsoft’s mitigations or discontinue use if no mitigations are available.

Defensive priority

High. CISA KEV inclusion indicates confirmed exploitation and a short remediation window, so this should be addressed urgently in standard patch and exposure-management workflows.

Recommended defensive actions

  • Review the Microsoft advisory linked by CISA for CVE-2023-36563 and apply the vendor’s recommended mitigations.
  • If mitigations are unavailable, follow CISA’s guidance to discontinue use of WordPad where possible.
  • Inventory systems and users that still depend on WordPad so remediation can be tracked to completion.
  • Verify remediation against the CISA KEV due date of 2023-10-31 and escalate any overdue assets.
  • Monitor security advisories and endpoint telemetry for any signs that WordPad exposure remains present in the environment.

Evidence notes

Source corpus support is limited to the CISA KEV entry and the official links it provides. The KEV metadata lists Microsoft WordPad as the affected product, marks the vulnerability as known exploited, gives dateAdded 2023-10-10 and dueDate 2023-10-31, and states the required action: apply mitigations per vendor instructions or discontinue use if mitigations are unavailable. The corpus does not provide a CVSS score or additional technical exploit details.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-36563 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-36563

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

  • CVE-2023-36563 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-36563

    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.