CVE-2019-25572 NordVPN 6.19.6 Denial of Service via Email Field Buffer Overflow

Medium 6.9 Published 21 Mar 2026 Updated 23 Mar 2026

Local attackers can crash the NordVPN application by pasting an excessively long string into the email login field.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-25572?

CVE-2019-25572 is a medium-severity denial of service vulnerability in NordVPN, published on 21 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-1260

Which versions are affected by CVE-2019-25572?

It affects 1 product.

Products include Nordvpn Nordvpn.

How do I fix CVE-2019-25572?

No fix has been published for CVE-2019-25572 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-25572 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25572 exists.

Sources

Also known as GHSA-cqg2-35mm-6458.