CVE-2019-25572

MEDIUM

NordVPN 6.19.6 Denial of Service via Email Field Buffer Overflow

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-25572. PoCs published by Alejandra Sánchez.

AI-analyzed exploit summary This PoC exploits a buffer overflow vulnerability in NordVPN 6.19.6 by generating a large string of 'A' characters (100,000 bytes) and writing it to a file. When pasted into the 'E-mail' field during login, it triggers a crash (DoS).

Description

NordVPN 6.19.6 contains a denial of service vulnerability that allows local attackers to crash the application by submitting an excessively long string in the email input field. Attackers can paste a buffer of 100,000 characters into the email field during login to trigger an application crash.

Exploits (1)

exploitdb WORKING POC
by Alejandra Sánchez · pythondoswindows
https://www.exploit-db.com/exploits/46343

This PoC exploits a buffer overflow vulnerability in NordVPN 6.19.6 by generating a large string of 'A' characters (100,000 bytes) and writing it to a file. When pasted into the 'E-mail' field during login, it triggers a crash (DoS).

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: NordVPN 6.19.6
No auth needed
Prerequisites: Python to generate the PoC file · NordVPN 6.19.6 installed on Windows 10
devstral-2 · analyzed Mar 21, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-46343
https://www.exploit-db.com/exploits/46343
Product product
Official Product Homepage
https://nordvpn.com/
Third Party Advisory third-party-advisory
VulnCheck Advisory: NordVPN 6.19.6 Denial of Service via Email Field Buffer Overflow
https://www.vulncheck.com/advisories/nordvpn-denial-of-service-via-email-field-buffer-overflow

Scores

CVSS v3 6.2
EPSS 0.0016
EPSS Percentile 5.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1260
Status published
Products (2)
nordvpn/nordvpn < 6.19.6
Nordvpn/NordVPN 6.19.6
Published Mar 21, 2026
Tracked Since Mar 21, 2026