Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability

Description

References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 · Vendor Advisory
• cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
• CISA KEV · CVE-2026-21514

More vulnerabilities in office long term servicing channel

• CVE-2026-42832MEDIUM 5.5Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.
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• CVE-2026-40421MEDIUM 4.3Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally…
• CVE-2026-40420HIGH 8.8Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
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