Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
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Score 3.3 from GitHub Security Advisory (severity: LOW) published 2026-06-09. NVD baseline CVSS 4.3; sources differ by 1.0.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
June 9, 2026
June 19, 2026
Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45455These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Explore the affected products and dependency analysis for CVE-2026-45455
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