HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a setting, the admin user console could be disabled due to a fatal PHP error.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

References
History

Wed, 21 Jan 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-134
Metrics ssvc

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


Wed, 21 Jan 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Revive
Revive adserver
Vendors & Products Revive
Revive adserver

Tue, 20 Jan 2026 21:00:00 +0000

Type Values Removed Values Added
Description HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a setting, the admin user console could be disabled due to a fatal PHP error.
References
Metrics cvssV3_0

{'score': 2.7, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-01-21T18:52:43.635Z

Reserved: 2026-01-01T15:00:02.339Z

Link: CVE-2026-21640

cve-icon Vulnrichment

Updated: 2026-01-21T18:35:26.346Z

cve-icon NVD

Status : Received

Published: 2026-01-20T21:16:06.063

Modified: 2026-01-21T19:16:05.663

Link: CVE-2026-21640

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-21T11:18:53Z

Weaknesses