CVE-2026-88201CWE-126

CVE-2026-88201

Medium · published October 13, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
49.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00626 · 49.4th percentile
Weakness
CWE-126 · Buffer Over-read
Published
2026-10-13T23:21Z
Affected products (6)
ProductVersionsFixed in
microsoft/365_appsall versions—
microsoft/365_appsall versions—
microsoft/office_2021all versions—
microsoft/office_2021all versions—
microsoft/office_2024all versions—
microsoft/office_2024all versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88201 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 1%
    epss
  • 13 OCT 19:00Z
    Microsoft Office Excel Information Disclosure Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Microsoft Office Excel Information Disclosure Vulnerability
    cvelistv5