Client crash via oversized password input
Published May 25, 2026 · Updated May 25, 2026
Denial of service in NordVPN 6.14.31 and earlier allows local users to crash the Windows client via an oversized password. The Windows sign-in form processes a 100,000-character password without enforcing an input-length bound and crashes during authentication. Exploitation requires interactive access to the client and placement of the generated text into its password field; the published artifact demonstrates only a client crash.
Summary
What happened
Denial of service in NordVPN 6.14.31 and earlier allows local users to crash the Windows client via an oversized password. The Windows sign-in form processes a 100,000-character password without enforcing an input-length bound and crashes during authentication. Exploitation requires interactive access to the client and placement of the generated text into its password field; the published artifact demonstrates only a client crash.
The record
- CVE
- CVE-2018-25368
- Published
- May 25, 2026
- Updated
- May 25, 2026
- Vendor
- nordvpn S.A.
- Product
- NordVPN
- Classifications
- CWE-789, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 25, 2026CVE publishedPublication date reported by the CVE source.
- May 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=6.14.31
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Nord VPN 6.14.31 - Denial of Service (PoC)proof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo