What is CVE-2026-21641?

CVE-2026-21641 is a medium-severity vulnerability in Aquaplatform Revive Adserver, classified under Improper Authorization. CVSS score: 6.5/10. Published 2026-01-20.

How severe is CVE-2026-21641?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Aquaplatform Revive Adserver

CVE-2026-21641

HackerOne community member Jad Ghamloush (0xjad) has reported an authorization bypass vulnerability in the `tracker-delete.php` script of Revive Adserver. Users with permissions to delete trackers are mistakenly allowed to delete trackers owned by other accounts.

Published 2026-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Aquaplatform Revive Adserver
Revive Adserver — versions 6

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

hackerone.com/reports/3445710 (Third Party Advisory)

Frequently asked questions

What is CVE-2026-21641?: CVE-2026-21641 is a medium-severity vulnerability in Aquaplatform Revive Adserver, classified under Improper Authorization. CVSS score: 6.5/10. Published 2026-01-20.
How severe is CVE-2026-21641?: Medium severity. CVSS v3 base score is 6.5 out of 10.