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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.

PUBLISHED Reserved 2026-03-21 | Published 2026-03-21 | Updated 2026-03-23 | Assigner VulnCheck




MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Improper Handling of Overlap Between Protected Memory Ranges

Product status

6.19.6
affected

Credits

Alejandra Sánchez finder

References

www.exploit-db.com/exploits/46343 (ExploitDB-46343) exploit

nordvpn.com/ (Official Product Homepage) product

downloads.nordcdn.com/.../10/NordVPN/latest/NordVPNSetup.exe (Product Reference) product

www.vulncheck.com/...service-via-email-field-buffer-overflow (VulnCheck Advisory: NordVPN 6.19.6 Denial of Service via Email Field Buffer Overflow) third-party-advisory

cve.org (CVE-2019-25572)

nvd.nist.gov (CVE-2019-25572)

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