Security readout for executives and security teams
This is a legacy Microsoft Excel remote code execution flaw. A malicious Excel file can corrupt a record pointer and let an attacker run code when affected Office, Excel Viewer, or Mac converter software processes it. The main business risk is exposure from old, unsupported Office installations still opening untrusted spreadsheets. Exposure is most likely in legacy desktops, kiosk systems, virtual desktops, file-processing workflows, or archives that still use the listed Office, Excel Viewer, or Mac converter versions. Treat this as high priority only where legacy Microsoft Office remains deployed. The vulnerability enables code execution through malicious spreadsheets, but the affected product set is old and should be handled through retirement, isolation, or vendor-directed updates. Mitigation focus: Identify and retire affected Office, Excel Viewer, and Mac converter versions.; Apply Microsoft guidance from MS09-021 where systems remain in scope.; Block untrusted legacy Excel attachments where practical..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2009-0549 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- MS09-021CVE reference · vendor-advisory, x_refsource_MS
- oval:org.mitre.oval:def:5830CVE reference · vdb-entry, signature
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
