PT-2026-24318 · Microsoft · Office Excel

Jq0904 + 1 · Published 2026-03-10 · Updated 2026-04-07 · CVE-2026-26108

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified)

Description A heap-based buffer overflow exists in Microsoft Office Excel. This issue allows an unauthorized attacker to execute code locally. Exploitation may allow an attacker to execute arbitrary code and affect the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-787

CWE-122

Related Identifiers

BDU:2026-03045

CVE-2026-26108

Affected Products

Office Excel

References · 9

• https://osv.dev/vulnerability/CVE-2026-26108 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-26108 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-26108 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26108 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03045 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/729784 · Security Note
• https://twitter.com/CVEnew/status/2033361119373353428 · Twitter Post
• https://twitter.com/RedHornet_Intel/status/2041627022011625667 · Twitter Post
• https://t.me/avleonovcom/1637 · Telegram Post