Vulnerability · Published Mar 5, 2021 · Assigned by zdi

CVE-2021-27255

Medium 6.3

In plain English

A medium-severity missing authentication 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 1.4% (higher than 73% of all known vulnerabilities).

Severity (CVSS 3.0)6.3Medium

Exploit odds (30 days)1.4%top 27.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the refresh_status.aspx endpoint. The issue results from a lack of authentication required to start a service on the server. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12360.

Affected products (as reported)

Vendor	Product	Versions
NETGEAR	R7800	firmware version 1.0.2.76

Weakness: CWE-306 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-21-263/ x_refsource_MISC