CVE-2020-29238

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote...

7.5 HighPublic exploit

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote attackers to obtain sensitive information when the server running as reverse proxy via specially crafted request.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

16.5%Up 10.5 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2020-29238
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-190
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-29238
Updated: 2026-11-02

EUVDEUVD-2020-21617 No score

Record: EUVD-2020-21617
Updated: 2026-11-02

GitHub AdvisoriesGHSA-647h-v8f6-577g 7.5

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote...

Record: GHSA-647h-v8f6-577g
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-190
Updated: 2026-11-02

Affected products

expressvpn

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	ExpressVPN VPN Router 1.0 - Router Login Panel's Integer Overflow	2021-04-13

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-29238 is a high vulnerability (CVSS 7.5) in Expressvpn, published March 10, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 16.5%, the 97th percentile. No source names a fixed version.