What’s Vulnerable › Vulnerabilities

CVE-2021-31802

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 14.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-26 · updated 2026-06-17
• Weakness: CWE-787

Description

NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable from the local network without authentication. The vulnerability exists within the handling of an HTTP request. An attacker can leverage this to execute code as root. The problem is that a user-provided length value is trusted during a backup.cgi file upload. The attacker must add a \n before the Content-Length header.

Affected products

• NETGEAR R7000: through 1.0.11.116

References

• https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/
• https://www.netgear.com/about/security/
• https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/
• https://www.netgear.com/about/security/

Get alerted when CVE-2021-31802 or the next vulnerability affects your stack