CVE-2018-25241

HIGH

VPN Browser+ 1.1.0.0 Denial of Service

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-25241. PoCs published by 0xB9.

AI-analyzed exploit summary This Python script generates a buffer overflow payload (5800 'A' characters) to trigger a Denial of Service (DoS) in VPN Browser+ 1.1.0.0 by pasting the payload into the search bar. The exploit is straightforward and relies on a lack of input validation.

Description

VPN Browser+ 1.1.0.0 contains a denial of service vulnerability that allows unauthenticated attackers to crash the application by submitting oversized input through the search functionality. Attackers can paste a large buffer of characters into the search bar to trigger an unhandled exception that terminates the application.

Exploits (1)

exploitdb WORKING POC
by 0xB9 · pythondoswindows
https://www.exploit-db.com/exploits/46198

This Python script generates a buffer overflow payload (5800 'A' characters) to trigger a Denial of Service (DoS) in VPN Browser+ 1.1.0.0 by pasting the payload into the search bar. The exploit is straightforward and relies on a lack of input validation.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: VPN Browser+ 1.1.0.0
No auth needed
Prerequisites: VPN Browser+ 1.1.0.0 installed on Windows 10 · ability to paste text into the search bar
devstral-2 · analyzed Apr 07, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-46198
https://www.exploit-db.com/exploits/46198
Product product
Product Reference
https://www.microsoft.com/store/productId/9NFFFFS5Z2C7
Third Party Advisory
VulnCheck Advisory: Microsoft VPN Browser+ 1.1.0.0 Denial of Service
https://www.vulncheck.com/advisories/microsoft-vpn-browser-denial-of-service
Third Party Advisory third-party-advisory
VulnCheck Advisory: VPN Browser+ 1.1.0.0 Denial of Service
https://www.vulncheck.com/advisories/vpn-browser-denial-of-service

Scores

CVSS v3 7.5
EPSS 0.0036
EPSS Percentile 27.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-306
Status published
Products (1)
VPNBrowser/VPN Browser+ 1.1.0.0
Published Apr 04, 2026
Tracked Since Apr 04, 2026