Information Disclosure Vulnerability in NST Labs Tech Nstbrowser Product
CVE-2026-122028

5.3MEDIUM

Key Information:

Vendor

Nst Labs Tech

Status
Nstbrowser
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-122028?

A vulnerability exists in NST Labs Tech Nstbrowser version 1.21.0, impacting the Local Agent API component. This flaw allows for unauthorized access to sensitive information via the /agent/info file. The attack can be executed remotely, promoting risks of data exposure. Despite early notifications to the vendor regarding this security issue, no response has been documented, raising concerns about the mitigation of potential exploits.

Affected Version(s)

Nstbrowser 1.21.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-122028 - Proof of Concept

References

https://vuldb.com/vuln/431091
vdb-entry
https://vuldb.com/vuln/431091/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-122028
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

PoriaMs (VulDB User)
VulDB CNA Team
.