CVE-2026-79901

Predictable Active Directory service-account passwords in BoKS Manager

Published Oct 1, 2026 CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed
Description
In deployments using BoKS keytab management, affected versions of boks_keytabmd generate Active Directory service-account passwords from a predictable pseudo-random sequence seeded with the current Unix timestamp. An attacker who knows the service principal and can estimate the password-change time can reproduce a limited candidate set and verify candidates offline.

Remediation

Vendor Solution

Upgrade the active BoKS Master to boks-server 9.0.0.7 and restart BoKS before generating replacement passwords.


Vendor Workaround

Installing the update does not secure passwords generated by an affected release. Rotate all affected or uncertain service-account passwords through BoKS keytab management and confirm distribution of the new key version. After the Active Directory domain's configured maximum service-ticket lifetime plus clock-skew allowance has elapsed, rebuild affected keytabs during a maintenance window so they retain only the current key version. Redistribute and verify the keytabs, restart or reload dependent services as required, and test Kerberos authentication. If compromise is suspected, rotate and rebuild immediately rather than waiting for existing tickets to expire.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Fortra
Fortra boks Manager Boks-server
Vendors & Products Fortra
Fortra boks Manager Boks-server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In deployments using BoKS keytab management, affected versions of boks_keytabmd generate Active Directory service-account passwords from a predictable pseudo-random sequence seeded with the current Unix timestamp. An attacker who knows the service principal and can estimate the password-change time can reproduce a limited candidate set and verify candidates offline.
Title Predictable Active Directory service-account passwords in BoKS Manager
Weaknesses CWE-338
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Fortra
Published
Updated
Oct 1, 2026, 2:43 PM
Reserved
Aug 25, 2026, 2:50 PM
Status
Deferred
Published
Oct 1, 2026, 2:17 PM
Modified
Oct 1, 2026, 3:17 PM