PatchSiren

PatchSiren cyber security CVE debrief

CVE-2007-0671 Microsoft CVE debrief

CVE-2007-0671 is a Microsoft Office Excel remote code execution vulnerability that CISA has listed in the Known Exploited Vulnerabilities catalog. The supplied corpus indicates active exploitation is significant enough to require prioritized remediation, with CISA directing organizations to apply vendor mitigations and to discontinue use of the product if mitigations are unavailable. Microsoft’s Security Bulletin MS07-015 is referenced in the source notes as the vendor guidance to review.

Vendor
Microsoft
Product
Office
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2025-08-12
Original CVE updated
2025-08-12
Advisory published
2025-08-12
Advisory updated
2025-08-12

Who should care

Security teams, endpoint administrators, patch management owners, and incident responders responsible for Microsoft Office or Excel deployments should treat this as a priority. Any environment that still uses affected Office/Excel versions should validate exposure and remediation status promptly.

Technical summary

Based on the supplied sources, this is a Microsoft Office Excel remote code execution issue. The corpus does not provide exploit mechanics, affected versions, or a CVSS score, but it does establish that CISA considers the vulnerability actively exploited and has linked the issue to Microsoft Security Bulletin MS07-015, the NVD record, and the official CVE entry.

Defensive priority

High

Recommended defensive actions

  • Review Microsoft Security Bulletin MS07-015 and the official NVD/CVE records for affected versions and remediation guidance.
  • Apply Microsoft mitigations or patches as instructed by the vendor.
  • Prioritize remediation for any exposed Office/Excel installations before the CISA KEV due date of 2025-09-02.
  • If mitigations are unavailable, follow CISA guidance to discontinue use of the product.
  • Confirm asset inventory and validate that no unmanaged or legacy Office/Excel deployments remain exposed.

Evidence notes

The source corpus is limited to CISA KEV metadata and official record links. It identifies the vulnerability as "Microsoft Office Excel Remote Code Execution Vulnerability," marks it as a KEV entry, lists Microsoft as the vendor/project, and provides the KEV dates added 2025-08-12 and due 2025-09-02. The metadata also references Microsoft Security Bulletin MS07-015 and the NVD detail page. No CVSS score or deeper technical description is present in the supplied corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2007-0671 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2007-0671

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

  • CVE-2007-0671 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2007-0671

    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.