CVE-2025-59775: Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF

Published Dec 4, 2025
·
Updated

802.1X. An authentication issue was addressed with improved state management.

Other sources

Accounts. An authorization issue was addressed with improved state management.

— Apple

Admin Framework. A path handling issue was addressed with improved validation.

— Apple

Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF

— Microsoft

apache. This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org.

— Apple

Server-Side Request Forgery (SSRF) vulnerability

in Apache HTTP Server on Windows

with AllowEncodedSlashes On and MergeSlashes Off  allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content

Users are recommended to upgrade to version 2.4.66, which fixes the issue.

— MITRE

Credit

Rosyna Keller(Totally Not Malicious Software), CVE-2025-55753, CVE-2025-58098, CVE-2025-59775, CVE-2025-65082, CVE-2025-66200, Johnny Franks (zeroxjf), an anonymous researcher, Mickey Jin@@patch1t, Justin Cohen(Google), Jex Amro, Amy (amys.website), Cristian Dinca (icmd.tech), @@cloudlldb, Hossein Lotfi@@hosselot(TrendAI Zero Day Initiative), YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), Etienne Charron (Renault), Victoria Martini (Renault), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), CVE-2025-14524, 风沐云烟@@binary_fmyy, Minghao Lin@@Y1nKoc, DARKNAVY@@DarkNavyOrg, Kirin@@Pwnrin, Zhongcheng Li(IES Red Team), CVE-2025-64505, Gor Aleksanyan(BoB 0xB6), Dhiyanesh Selvaraj@@redroot97(BoB 0xB6), 이동하 (Lee Dong Ha(BoB 0xB6), Jian Lee@@speedyfriend433, hari shanmugam, Johnny Franks@@zeroxjf, Sreejith Krishnan R, Himanshu Bharti@@Xpl0itme(Khatima), Chunyu Song(NorthSea), Rodolphe Brunetti@@eisw0lf(Lupus Nova), Matej Moravec@@MacejkoMoravec, Csaba Fitzl@@theevilbit(Iru), Dawuge(Shuffle Team), Hunan University, Kun Peeks@@SwayZGl1tZyyy, Gyujeong Jin at Team.0xb6@@G1uN4sh, wdszzml, Atuin Automated Vulnerability Discovery Engine, Alex Radocea, Christian Kohlschütter, Dave G., @@pixiepointsec, Caspian Tarafdar, Andrew Becker, Héloïse Gollier, Mathy Vanhoef (KU Leuven), Ryan Dowd@@_rdowd, Koh M. Nakagawa@@tsunek0h(FFRI Security Inc), Talal Haj Bakry(Mysk Inc), Tommy Mysk@@mysk_co(Mysk Inc), Zhongquan Li@@Guluisacat, Asaf Cohen, XiguaSec, Ye Zhang(Baidu Security), Ryan Dowd@@_rdowd(Iru), Joseph Ravichandran@@0xjprx(MIT CSAIL), Yuebin Sun@@yuebinsun2020(SecuRing), an anonymous researcher(SecuRing), Nathaniel Oh@@calysteon(SecuRing), Kirin@@Pwnrin(SecuRing), Wojciech Regula(SecuRing), Joshua Jewett@@JoshJewett33, Ilya Andr (andrd3v)(Voynich Group), Ilias Morad (A2nkF)(Voynich Group), Duy Trần@@khanhduytran0, @@hugeBlack, Gergely Kalman@@gergely_kalman, Andrei Dodu, Morris Richman@@morrisinlife, Luke Roberts@@rookuu, Pedro Tôrres@@t0rr3sp3dr0, webb, Thomas Espach, @@hamayanhamayan, Yeonghyeon Choi, Daniel Rhea, Söhnke Benedikt Fischedick (Tripton), Emrovsky & Switch3301, Yevhen Pervushyn, Minse Kim, Narcis Oliveras Fontàs, Nathaniel Oh@@calysteon, Hongze Wu(Ant Group Infrastructure Security Team), Shuaike Dong(Ant Group Infrastructure Security Team), greenbynox, Arni Hardarson, Gongyu Ma@@Mezone0

Affected Software

7 affected componentsFixes available
Apache HTTP Server<2.4.66
Microsoft azl3 httpd 2.4.65-1
Microsoft cbl2 httpd 2.4.65-1
Apache HTTP Server>=2.4.0<2.4.66
Apple macOS Tahoe<26.4
26.4
Apple macOS Sequoia<15.7.5
15.7.5
Apple macOS Sonoma<14.8.5
14.8.5

Event History

Dec 5, 2025
CVE Published
via MITRE·10:17 AM
Data Sourced
via MITRE·10:17 AM
DescriptionWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeaknessAffected Software
Dec 7, 2025
Data Sourced
via Microsoft·01:03 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·01:03 AM
Affected Software
Updated
via Microsoft·01:03 AM
DescriptionSeverity
Mar 24, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
Affected Software
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2025-59775?

CVE-2025-59775 is classified as a high severity Server-Side Request Forgery (SSRF) vulnerability.

2

How do I fix CVE-2025-59775?

To fix CVE-2025-59775, upgrade your Apache HTTP Server to version 2.4.67 or later.

3

What versions of Apache HTTP Server are affected by CVE-2025-59775?

CVE-2025-59775 affects Apache HTTP Server versions up to 2.4.66.

4

What does the vulnerability CVE-2025-59775 allow an attacker to do?

CVE-2025-59775 allows an attacker to potentially leak NTLM hashes to a malicious server via exploited SSRF.

5

On which platform does CVE-2025-59775 occur?

CVE-2025-59775 occurs specifically on the Windows platform of Apache HTTP Server.

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