Is CVE-2026-50739 in the CISA KEV catalog?

No. CVE-2026-50739 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-50739?

CVE-2026-50739 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-50739?

CVE-2026-50739 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50739?

Upgrade revive adserver to 6.0.8 or later.

CVE & CISA-KEV Catalog

CVE-2026-50739

MEDIUM

4.3

CVSS v3

NVD

Description

A bypass for CVE‑2026‑34913 exists with proper ownership validation that had not been applied to the reverse operation of linking campaigns and trackers through the `tracker-campaigns.php` script in Revive Adserver 6.0.7 and earlier. As a result, a low‑privileged user could link their trackers to campaigns owned by other managers on the same instance, leading to inconsistent ownership relationships.

CWE-284Improper Access Control

How to fix

Remediation Available

revive adserverNVD

Affected:< 6.0.8Fixed in:6.0.8CVE-2026-50739derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Third-Party Advisory1

hackerone.com

Embed a live status badge for CVE-2026-50739

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-29.