Format String Injection in Revive Adserver by Revive Adserver
CVE-2026-21640

2.7LOW

Key Information:

Vendor

Revive

Status
Revive Adserver
Vendor
CVE Published:
20 January 2026

What is CVE-2026-21640?

A format string injection vulnerability has been identified in the settings of Revive Adserver. This flaw allows an attacker to utilize specific character combinations that can result in a fatal PHP error, consequently disabling the admin user console. As a result, administrators may be unable to access critical functionalities of the platform, leading to potential exploitation.

Affected Version(s)

Revive Adserver 6 <= 6.0.4

References

https://hackerone.com/reports/3445332

CVSS V3.0

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.