CVE-2026-88203
Microsoft Office PowerPoint Information Disclosure Vulnerability
Microsoft Microsoft 365 Apps for EnterpriseApplications & CMS
CVSS
6.5MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.83%Chance of exploitation activity in the next 30 days, higher than 57% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 16.0.14334.20974Microsoft Office LTSC 2021CVE List
- 16.0.17932.21056Microsoft Office LTSC 2024CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
Description
Untrusted pointer dereference in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
Text from CVE List
Affected versions 3
- Microsoft 365 Apps for Enterpriseaffected: 16.0.1 before https://aka.ms/OfficeSecurityReleasesCVE List
- Microsoft Office LTSC 2021affected: 16.0.1 before 16.0.14334.20974CVE List
- Microsoft Office LTSC 2024affected: 16.0.0 before 16.0.17932.21056CVE List