Vulnerability · Published Mar 5, 2021 · Assigned by zdi

CVE-2021-27254

Medium 6.3

In plain English

A medium-severity security flaw in R7800 from NETGEAR. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.0)6.3Medium

Exploit odds (30 days)0.5%top 55.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability. The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability to execute arbitrary code in the context of root. Was ZDI-CAN-12287.

Affected products (as reported)

Vendor	Product	Versions
NETGEAR	R7800	firmware version 1.0.2.76

Weakness: CWE-259 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

https://www.zerodayinitiative.com/advisories/ZDI-21-252/ x_refsource_MISC
https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders x_refsource_MISC