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PatchSiren cyber security CVE debrief

CVE-2015-1641 Microsoft CVE debrief

CVE-2015-1641 is a Microsoft Office memory corruption vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. Because it is marked as known exploited, defenders should treat it as a patch-priority issue and apply Microsoft-recommended updates as soon as practical.

Vendor
Microsoft
Product
Office
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Microsoft Office administrators, endpoint security teams, vulnerability management teams, and SOC analysts responsible for systems running Office.

Technical summary

The supplied corpus identifies the issue only as a Microsoft Office memory corruption vulnerability. CISA’s KEV entry confirms it has been observed as exploited in the wild and directs organizations to apply updates per vendor instructions. No further technical details, impact scope, or CVSS score are provided in the supplied source material.

Defensive priority

High. CISA inclusion in the Known Exploited Vulnerabilities catalog is a strong signal to prioritize remediation over routine patch queues.

Recommended defensive actions

  • Apply Microsoft updates per vendor instructions.
  • Inventory and confirm which endpoints and servers have Microsoft Office installed.
  • Prioritize remediation on the most exposed and business-critical systems first.
  • Verify patch deployment and track any exceptions to closure.
  • Use the CISA KEV catalog and vendor advisory records to confirm remediation status.

Evidence notes

The only supplied authoritative source is the CISA KEV feed entry, which names the vulnerability as 'Microsoft Office Memory Corruption Vulnerability,' marks it as a known exploited vulnerability, and states 'Apply updates per vendor instructions.' The linked CVE and NVD records are official reference pages for the same identifier. No CVSS score or deeper exploit details were included in the corpus.

Official resources

In the supplied corpus, the CVE record and KEV entry are dated 2021-11-03, with a KEV due date of 2022-05-03. These dates reflect the provided record timeline and should not be treated as the original vulnerability introduction date.