microsoft excel security

About this tag
Microsoft Excel security discussions on WindowsForum.com cover vulnerability scoring and disclosure nuances. Topics include CVE-2026-45455, an information disclosure flaw in Excel with limited confidentiality impact, and the distinction between CVSS local attack vector ratings and Microsoft's remote code execution descriptions. These threads help users understand why seemingly low-severity CVSS scores still matter in enterprise environments where Excel files are widely trusted, and how Microsoft's advisory titles can appear contradictory without separating attack vector from impact. The content focuses on interpreting security bulletins and CVSS metrics for Excel vulnerabilities.

  1. CVE-2026-45455 Excel Info Disclosure: Why “C:L, I:N, A:N” Still Matters

    On June 9, 2026, Microsoft’s Security Update Guide entry for CVE-2026-45455 described a Microsoft Excel information disclosure vulnerability whose CVSS impact metrics indicate limited confidentiality loss, with no direct integrity or availability impact if exploitation succeeds. That wording is...
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    • cve-2026-45455 information disclosure microsoft excel security office vulnerabilities
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    • Forum: Security Alerts

  2. Excel “Remote Code Execution” vs CVSS AV:L: Why They Aren’t Contradictory

    Microsoft’s naming here is not contradictory once you separate the attack vector from the effect. In CVSS, AV:L means the exploit requires local interaction on the target machine, or a local foothold in the attack path, while Remote Code Execution in Microsoft’s title describes the impact: the...
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    • cvss scoring microsoft excel security office vulnerabilities remote code execution
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    • Forum: Security Alerts