CVE-2026-45455

LOW

Published Jun 9, 2026 Modified Jun 9, 2026 CWE-125

Description

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

CVSS v3.1 Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0063

Probability of exploitation

0.46%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

References

Other References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45455

Frequently Asked Questions

What is CVE-2026-45455? +

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2026-45455? +

CVE-2026-45455 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0063, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-45455? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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