CVE-2020-29238

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.

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS

16.48% chance of exploitation in the next 30 days, 97th percentile

Published

2021-03-10

Updated

2026-07-09

Proof-of-concept exploits (2)

• ajvarela/amadeus-exploit0★ · 2025-02-14
• ajvarela/amadeus-exploit-peerj250★ · 2025-02-14

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/49760

Security advisories

• http://ja1sharma.com/blog/2021/CVE-2020-29238
• http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.ht…
• https://bugcrowd.com/disclosures/4e8d5325-8e49-4ea3-962a-a088bbb73a3f/expressvpn-router-i…

References

• CVE Record
• NVD entry