CVE-2026-87692CWE-502insecure-deserialization

CVE-2026-87692

High · published October 13, 2026

CVSS v3.1
7.8
EPSS
2%
Percentile
75.4
In the wild
Unconfirmed
What it is

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01587 · 75.4th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-10-13T23:21Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87692 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 2%
    epss
  • 13 OCT 19:01Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5
  • 13 OCT 19:01Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5