High severity · published Dec 5, 2025
CVE-2025-59775
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…
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.0 before 2.4.66 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59775
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59775
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_24.html
Issue Tracking
http://www.openwall.com/lists/oss-security/2025/12/04/6
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