CVE-2026-55005CWE-122

CVE-2026-55005

High · published July 14, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
62.8
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code 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
0.01010 · 62.8th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-07-14T21:17Z
Affected products (4)
ProductVersionsFixed in
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_server_subscription_edition< 15.02.2562.04515.02.2562.045
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55005 · [email protected]
EPSS history
Timeline
  • 14 JUL 17:04Z
    Microsoft Exchange Server Remote Code Execution Vulnerability
    cvelistv5