CVE-2025-11561: Improper Privilege Management
Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 09:08 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
1. Immediately apply any patches or updates released by Red Hat addressing CVE-2025-11561 once available. 2. Review and harden Active Directory permissions to restrict modification rights on sensitive attributes like userPrincipalName and samAccountName to trusted administrators only. 3. Disable or restrict fallback authentication plugins such as an2ln in SSSD configuration if not required, to prevent fallback exploitation. 4. Implement monitoring and alerting on changes to critical AD attributes and anomalous authentication attempts on Linux hosts. 5. Use multi-factor authentication (MFA) where possible to add an additional layer of security beyond AD credentials. 6. Conduct regular audits of domain-joined Linux hosts to verify correct SSSD configurations and detect unauthorized privilege escalations. 7. Employ network segmentation and least privilege principles to limit the impact of compromised accounts. 8. Educate administrators on the risks of attribute modifications and enforce strict change management policies.
Description
A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, the Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is enabled, but a fallback to the an2ln plugin is possible. This fallback allows an attacker with permission to modify certain AD attributes (such as userPrincipalName or samAccountName) to impersonate privileged users, potentially resulting in unauthorized access or privilege escalation on domain-joined Linux hosts.
References
- access.redhat.com/errata/RHSA-2025:19610 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19847 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19848 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19849 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19850 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19851 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19852 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19853 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19854 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19859 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:20954 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21020 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21067 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21329 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21795 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22256 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22265 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22277 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22529 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22548 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22724 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:23113 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:0316 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:0677 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-11561 (opens in a new tab)
- blog.async.sg/kerberos-ldr (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2402727 (opens in a new tab)
- github.com/SSSD/sssd/issues/8021 (opens in a new tab)