CVE-2026-26144

Name: CVE-2026-26144
Creator: NVD / NIST
Published: 2026-03-10T18:18:43.11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2026-26144 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

1.21%

64.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Microsoft	365 Apps	All versions

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26144Vendor Advisory

Timeline

Published: Mar 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-26144?

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

How severe is CVE-2026-26144?

CVE-2026-26144 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2026-26144?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-26144?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST