CVE-2026-45503CWE-285

Microsoft Exchange Server Information Disclosure Vulnerability

High · published June 9, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
58.2
In the wild
Unconfirmed
What it is

Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00863 · 58.2th percentile
Weakness
CWE-285 · Improper Authorization
Published
2026-06-09T17:04Z
EPSS history
Timeline
  • 09 JUN 17:04Z
    Microsoft Exchange Server Information Disclosure Vulnerability
    cvelistv5