What’s Vulnerable › Vulnerabilities

CVE-2020-29238

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 16.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-10 · updated 2026-07-09
• Weakness: CWE-190

Description

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.

Affected products

• Expressvpn: 1.0

References

• http://ja1sharma.com/blog/2021/CVE-2020-29238/
• http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html
• 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
• http://ja1sharma.com/blog/2021/CVE-2020-29238/
• http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html
• 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

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