{"id":"CVE-2020-29238","title":"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.","summary":"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.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-190"],"vendor":"expressvpn","product":"expressvpn","affected":["expressvpn = 1.0"],"published":"2021-03-10","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-29238","references":[{"url":"http://ja1sharma.com/blog/2021/CVE-2020-29238/","label":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html","label":"cve@mitre.org"},{"url":"https://bugcrowd.com/disclosures/4e8d5325-8e49-4ea3-962a-a088bbb73a3f/expressvpn-router-integer-buffer-overflow-server-info-disclosure-when-router-s-nginx-server-used-as-reverse-proxy-server","label":"cve@mitre.org"},{"url":"http://expressvpn.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://ja1sharma.com/blog/2021/CVE-2020-29238/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugcrowd.com/disclosures/4e8d5325-8e49-4ea3-962a-a088bbb73a3f/expressvpn-router-integer-buffer-overflow-server-info-disclosure-when-router-s-nginx-server-used-as-reverse-proxy-server","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","exploit-available"],"epss":0.16483,"epssPercentile":0.96845,"exploitAvailable":true,"ingestedAt":"2026-07-05T00:59:25.835Z","exploits":{"exploitdb":true,"checkedAt":"2026-09-23T07:13:17.598Z"},"slug":"CVE-2020-29238","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `expressvpn = 1.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":41.3,"likelihood":3.3,"exploitation":12,"ransomware":0},"changes":[]}