Security readout for executives and security teams
This vulnerability affects older Microsoft Excel components. A malicious Excel file could corrupt memory and let an attacker run code on the user’s system. Business risk depends on whether the named legacy Office products or Mac converter remain in use and whether users can open untrusted spreadsheets. Exposure is most likely in environments retaining the named older Microsoft Office for Mac or Office 2000 components, especially where users open spreadsheets from email, web downloads, or file shares. The bundle does not identify broader affected products beyond those named. Treat as high priority only where the named legacy products remain present. If those products are absent, this CVE is mainly a legacy hygiene and asset-verification item rather than an urgent enterprise-wide incident. Mitigation focus: Review Microsoft MS09-021 guidance for the applicable security update.; Inventory systems for the named Office and Mac converter products.; Prioritize removal or upgrade of legacy Office installations still in use..
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
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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-2009-0558 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:11525CVE 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.