CVE-2026-45583CWE-94

Microsoft Exchange Server Remote Code Execution Vulnerability

High · published June 9, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
52.5
In the wild
Unconfirmed
What it is

Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00697 · 52.5th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-06-09T17:04Z
EPSS history
Timeline
  • 09 JUN 17:04Z
    Microsoft Exchange Server Remote Code Execution Vulnerability
    cvelistv5