KB5055526: Windows Server 2022 / Azure Stack HCI 22H2 Security Update (April 2025)

high Nessus Plugin ID 234042

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 5055526. It is, therefore, affected by multiple vulnerabilities

- Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network. (CVE-2025-26687)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2025-27481)
- An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges. (CVE-2025-27740)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Apply Security Update 5055526

See Also

https://support.microsoft.com/help/5055526

Plugin Details

Severity: High

ID: 234042

File Name: smb_nt_ms25_apr_5055526.nasl

Version: 1.1

Type: local

Agent: windows

Published: 4/8/2025

Updated: 4/8/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-27481

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

CVSS Score Source: CVE-2025-27740

Vulnerability Information

CPE: cpe:/o:microsoft:windows_server_2022, cpe:/o:microsoft:azure_stack_hci:22h2

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/8/2025

Vulnerability Publication Date: 4/8/2025

CISA Known Exploited Vulnerability Due Dates: 4/29/2025

Reference Information

CVE: CVE-2025-21174, CVE-2025-21191, CVE-2025-21197, CVE-2025-21203, CVE-2025-21204, CVE-2025-21205, CVE-2025-21221, CVE-2025-21222, CVE-2025-24058, CVE-2025-24060, CVE-2025-24062, CVE-2025-24073, CVE-2025-24074, CVE-2025-26635, CVE-2025-26637, CVE-2025-26639, CVE-2025-26641, CVE-2025-26647, CVE-2025-26648, CVE-2025-26649, CVE-2025-26651, CVE-2025-26652, CVE-2025-26663, CVE-2025-26664, CVE-2025-26665, CVE-2025-26666, CVE-2025-26667, CVE-2025-26668, CVE-2025-26669, CVE-2025-26670, CVE-2025-26671, CVE-2025-26672, CVE-2025-26673, CVE-2025-26674, CVE-2025-26675, CVE-2025-26676, CVE-2025-26678, CVE-2025-26679, CVE-2025-26680, CVE-2025-26681, CVE-2025-26686, CVE-2025-26687, CVE-2025-26688, CVE-2025-27469, CVE-2025-27470, CVE-2025-27471, CVE-2025-27473, CVE-2025-27474, CVE-2025-27477, CVE-2025-27478, CVE-2025-27479, CVE-2025-27480, CVE-2025-27481, CVE-2025-27482, CVE-2025-27484, CVE-2025-27485, CVE-2025-27486, CVE-2025-27487, CVE-2025-27490, CVE-2025-27491, CVE-2025-27492, CVE-2025-27727, CVE-2025-27731, CVE-2025-27732, CVE-2025-27735, CVE-2025-27736, CVE-2025-27737, CVE-2025-27738, CVE-2025-27739, CVE-2025-27740, CVE-2025-27742, CVE-2025-29808, CVE-2025-29809, CVE-2025-29810, CVE-2025-29812, CVE-2025-29824

MSFT: MS25-5055526

MSKB: 5055526