PatchSiren cyber security CVE debrief
CVE-2023-36424 Microsoft CVE debrief
CVE-2023-36424 is a Microsoft Windows out-of-bounds read vulnerability that CISA has added to its Known Exploited Vulnerabilities catalog, which means it is treated as a known-exploited issue. The supplied corpus does not include a CVSS score or detailed vendor impact analysis, so the safest response is to follow Microsoft’s advisory and CISA’s required action guidance immediately.
- Vendor
- Microsoft
- Product
- Windows
- CVSS
- Unknown
- CISA KEV
- Listed
- Original CVE published
- 2026-04-13
- Original CVE updated
- 2026-04-13
- Advisory published
- 2026-04-13
- Advisory updated
- 2026-04-13
Who should care
Windows administrators, endpoint security teams, IT operations, and cloud service operators running Windows systems should prioritize this issue because it is listed in CISA KEV.
Technical summary
The vulnerability is identified as an out-of-bounds read in Microsoft Windows. CISA’s KEV listing indicates known exploitation, but the supplied source set does not provide deeper technical mechanics, CVSS, or affected component details. Use the Microsoft advisory linked from CISA for any vendor-specific remediation or mitigation steps.
Defensive priority
High
Recommended defensive actions
- Review Microsoft’s advisory for CVE-2023-36424 and apply the vendor-recommended mitigation or update path as soon as possible.
- Prioritize remediation before the CISA KEV due date of 2026-04-27.
- Inventory Windows assets to confirm exposure and verify patch status across endpoints, servers, and any Windows-based cloud services.
- If mitigations are unavailable, follow CISA guidance to discontinue use of the product; for cloud services, follow applicable BOD 22-01 guidance.
Evidence notes
This debrief is based only on the supplied CISA KEV record and the official Microsoft, NVD, and CVE links. The corpus confirms vendor/product, known exploitation status, and CISA dates, but does not provide CVSS, exploit details, or a full remediation bulletin.
Official resources
-
CVE-2023-36424 CVE record
CVE.org
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CVE-2023-36424 NVD detail
NVD
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CISA Known Exploited Vulnerabilities catalog
CISA - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Source item URL
cisa_kev
CVE and source timeline fields supplied with this request show published/modified dates of 2026-04-13, and CISA KEV dateAdded of 2026-04-13 with dueDate of 2026-04-27. This debrief uses those supplied dates as the authoritative timing for C