# CVE-2025-61912

## Summary

- **CVE ID:** CVE-2025-61912
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P)
- **CWE:** CWE-116, CWE-170
- **Published:** Oct 10, 2025
- **Last Modified:** Mar 12, 2026

## Description

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue.

## Affected Products

- python-ldap — python-ldap (< 3.4.5)

## References

- [CNA](https://github.com/python-ldap/python-ldap/security/advisories/GHSA-p34h-wq7j-h5v6)
- [CNA](https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f)
- [CNA](https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.43%
- **EPSS Percentile:** 36.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._