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CVE-2026-21854

Tarkov Data Manager authentication bypass

9.8 CRITICALEPSS 0.46%
  1. Published7 Jan 2026

Description

The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, an authentication bypass vulnerability in the login endpoint allows any unauthenticated user to gain full admin access to the Tarkov Data Manager admin panel by exploiting a JavaScript prototype property access vulnerability, combined with loose equality type coercion. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Tarkov Data Manager< 2025-01-02

Remediation

Fixed in
Tarkov Data Manager≥ 2025-01-02

References

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Frequently asked

Is CVE-2026-21854 being actively exploited?

CVE-2026-21854 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.46%.

How severe is CVE-2026-21854?

CVE-2026-21854 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.46% probability of exploitation.

Which products are affected by CVE-2026-21854?

Affected products include Tarkov Data Manager.

How do I fix CVE-2026-21854?

Upgrade affected software to a fixed version, for example Tarkov Data Manager 2025-01-02 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-21854 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.