CVE-2026-45455

CVE-2026-45455

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45455?: CVE-2026-45455 is a low-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-06-09.
How severe is CVE-2026-45455?: Low severity. CVSS v3 base score is 3.3 out of 10.