PT-2025-42005 · Microsoft · Exchange Server

Published 2025-10-14 · Updated 2025-10-27 · CVE-2025-53782

Positive Technologies (AI Summary)

CVSS v3.1

8.4

High

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Exchange Server (affected versions not specified)

Description An incorrect implementation of the authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally. An unauthenticated attacker with local access can exploit this flaw to gain administrative control over the affected system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-303

Related Identifiers

BDU:2025-14037

CVE-2025-53782

Affected Products

Exchange Server

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53782 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-14037 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-53782 · Security Note
• https://osv.dev/vulnerability/CVE-2025-53782 · Vendor Advisory
• https://twitter.com/CveTodo/status/1978161427559940188 · Twitter Post
• https://twitter.com/CVEnew/status/1978198295013994549 · Twitter Post
• https://t.me/cveNotify/140489 · Telegram Post