CVE-2026-96940CWE-1390

CVE-2026-96940

High · published October 2, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
40.8
In the wild
Unconfirmed
What it is

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00485 · 40.8th percentile
Weakness
CWE-1390 · Weak Authentication
Published
2026-10-02T23:16Z
Affected products (4)
ProductVersionsFixed in
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_server_subscription_edition< 15.02.2562.05315.02.2562.053
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96940 · [email protected]
EPSS history
Timeline
  • 04 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 02 OCT 19:06Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5