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.

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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
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