CVE-2025-53782 — Incorrect Implementation of Authentication Algorithm in Microsoft Exchange Server 2016 Cumulative Update 23

CWE-303 — Incorrect Implementation of Authentication Algorithm4 documents4 sources
Severity
7.8HIGHNVD
CNA8.4
EPSS
0.1%
top 79.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Microsoft Exchange Server 2016 Cumulative Update 23Microsoft Exchange Server 2019 Cumulative Update 14Microsoft Exchange Server 2019 Cumulative Update 15+2 more
Timeline
PublishedOct 14

Description

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages5 packages

▶NVDmicrosoft/exchange_server< 15.02.2562.029+2
▶CVEListV5microsoft/microsoft_exchange_server_subscription_edition_rtm15.02.0.0 — 15.02.2562.029

🔴Vulnerability Details

2
CVEList
Microsoft Exchange Server Elevation of Privilege Vulnerability↗2025-10-14
▶
GHSA
GHSA-2jpf-9r3f-f5p3: Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally↗2025-10-14
▶

📋Vendor Advisories

1
Microsoft
Microsoft Exchange Server Elevation of Privilege Vulnerability↗2025-10-14
▶
CVE-2025-53782 — Microsoft vulnerability | cvebase