Denial of Service Vulnerability in NordVPN by NordVPN
CVE-2019-25572

6.9MEDIUM

Key Information:

Vendor

Nordvpn

Status
Nordvpn
Vendor
CVE Published:
21 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25572?

NordVPN version 6.19.6 is liable to a denial of service vulnerability that enables local attackers to disrupt the application by providing an excessively long input in the email field. Specifically, attackers can crash the application by inputting a string of up to 100,000 characters during the login process. This flaw highlights the importance of input validation to ensure application stability and security.

Affected Version(s)

NordVPN 6.19.6

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-2019-25572 - Proof of Concept

References

https://www.exploit-db.com/exploits/46343
exploit
https://nordvpn.com/
product
https://downloads.nordcdn.com/apps/windows/10/NordVPN/lat...
product

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alejandra Sánchez
.