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CVE-2026-122020

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

Products / packages NST Labs Tech Nstbrowser

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:40:44 UTC
VulDB · CVSS:4.0 · 5.3
Assessment vectorCVSS: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
VulDB · CVSS:3.1 · 4.3
Assessment vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
VulDB · CVSS:3.0 · 4.3
Assessment vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
VulDB · CVSS 2 / source score · 5
Assessment vectorAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C
The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

medium5.3

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Exploit reference published

Source-linked evidence; not proof of attacks in the wild or independent validation.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

NST Labs Tech Nstbrowser up to version 1.2.1 has a denial of service vulnerability in the Local Agent Management Service's stopAllBrowsers function. Remote exploitation is possible. The impact is a denial of service.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

NST Labs Tech · VulDB

Nstbrowser

2 ranges
VulDB version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

1.2.0

1.2.1

unaffected

unknown

Other versions: unknown

Product identifiers (CPE)cpe:2.3:a:nst_labs_tech:nstbrowser:*:*:*:*:*:*:*:*
Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.

drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII ↗Attributed to VulDB

Original source description

Read the full publisher description

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.

References

6 sources
VulDB · advisory #431086
Security advisoryVulDB
VulDB · threat intelligence #431086
Security advisoryVulDB
VulDB · CVE-2026-122020
Security advisoryVulDB
VulDB · submission #1024994
Source referenceVulDB
drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII
Source referenceVulDB
drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII
Public exploit referenceVulDB

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-122020

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-404 ↗

Denial of Service

VulDB

Related →
Contributing organizations · 2
VulDB

Assigning organization

2026-11-06
CISA-ADP

Additional data publisher

2026-11-09

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-122020

    Observed 2026-11-09T17:16:14.539Z · upstream updated 2026-11-09T17:03:44.351Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-09T17:03:10.826504Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "poc"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.