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Fencer Vulns
high 7.5

CVE-2025-59775 json

Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF

published 2025-12-05 11 mo ago modified 2026-09-25 44 d ago also BIT-apache-2025-59775 , EUVD-2025-201394

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami apache 2.4.66
  • httpd hummingbird 1 2.4.66-6.hum1
  • httpd-core hummingbird 1 2.4.66-6.hum1
  • httpd-tools hummingbird 1 2.4.66-6.hum1
  • httpd-manual hummingbird 1 2.4.66-6.hum1
  • httpd-filesystem hummingbird 1 2.4.66-6.hum1

red hat advisories RHSA-2026:5156

  • apache2 openSUSE Tumbleweed 2.4.66-1.1

opensuse advisories openSUSE-SU-2025:15808-1

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 2.4.66-r0

alpine advisories ALPINE-CVE-2025-59775

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-59775 updated cvss 7.5

httpd: Apache HTTP Server: NTLM Leakage on Windows via SSRF

  • Red Hat Hardened Images httpd 2.4.66-6.hum1, httpd-core 2.4.66-6.hum1, httpd-tools 2.4.66-6.hum1, httpd-manual 2.4.66-6.hum1, httpd-filesystem 2.4.66-6.hum1
    fixed: vendor fix RHSA-2026:5156
  • Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual Red Hat Enterprise Linux 7 httpd, mod_ssl, mod_ldap, httpd-tools, mod_session, httpd-manual, +1 more Red Hat Enterprise Linux 8 httpd, mod_md, mod_ssl, mod_ldap, mod_http2, httpd-tools, +4 more Red Hat Enterprise Linux 9 httpd, mod_lua, mod_ssl, mod_ldap, httpd-core, httpd-tools, +4 more Red Hat Enterprise Linux 10 httpd Red Hat Hardened Images mod_lua 2.4.66-6.hum1, mod_ssl 2.4.66-6.hum1, mod_ldap 2.4.66-6.hum1, mod_session 2.4.66-6.hum1, mod_proxy_html 2.4.66-6.hum1
    +1 more products
    Red Hat JBoss Core Services httpd, jbcs-httpd24-httpd
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
11 mo ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami apache
>=2.4.0, <2.4.66
2.4.66

Affected products

  • Apache Software Foundation Apache HTTP Server

Classification

Weakness
  • CWE-918 Server-Side Request Forgery
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.