CVE-2026-122020
NST Labs Tech Nstbrowser Local Agent Management Service stopAll stopAllBrowsers denial of service
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Nstbrowser NST Labs Tech |
1.2.0 (affected) 1.2.1 (affected) |
CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 4.3 medium |
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 | CNA: VulDB |
| 3.0 / 4.3 medium |
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C | CNA: VulDB |
| 2.0 / 5.0 medium |
AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C | CNA: VulDB |
| 4.0 / 2.1 low |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L | NVD: [email protected] |
| 2.0 / 5.0 medium |
AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD: [email protected] |
Exploit evidence
- https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII
exploit · CNA: VulDB
References
- https://vuldb.com/vuln/431086CNA: VulDB · vdb-entry, technical-description
- https://vuldb.com/vuln/431086/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-122020CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1024994CNA: VulDB · third-party-advisory
- https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_linkCNA: VulDB · related
- https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XIICNA: VulDB · exploit
- https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII[email protected]
- https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_link[email protected]
- https://vuldb.com/cve/CVE-2026-122020[email protected]
- https://vuldb.com/submit/1024994[email protected]
- https://vuldb.com/vuln/431086[email protected]
- https://vuldb.com/vuln/431086/cti[email protected]
For agents and automation
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Endpoints and access details
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