CVE-2026-122020

MEDIUM 4.3

NST Labs Tech Nstbrowser Local Agent Management Service stopAll stopAllBrowsers denial of service

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

A security flaw has been discovered in NST Labs Tech Nstbrowser up to 1.2.1. The affected element is the function stopAllBrowsers of the file /api/agent/browser/stopAll of the component Local Agent Management Service. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-404
Vendor	nst labs tech
Product	nstbrowser
Published	Nov 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

NST Labs Tech / Nstbrowser

1.2.0 1.2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/431086 vuldb.com: https://vuldb.com/vuln/431086/cti vuldb.com: https://vuldb.com/cve/CVE-2026-122020 vuldb.com: https://vuldb.com/submit/1024994 drive.google.com: https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_link drive.google.com: https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII

Credits

🔍 wilson888 (VulDB User) VulDB CNA Team