CVE-2021-31802
highpriority · attend · 50EPSS 0.142 · 97 %ileexploit · functionalEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-31802cnnvd
- https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021042817cnnvd
- https://www.netgear.com/about/security/cnnvd
- https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/enisa_euvd
- https://www.netgear.com/about/security/enisa_euvd
- https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/ExploitThird Party Advisorynvd
- https://www.netgear.com/about/security/Vendor Advisorynvd
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