CVE-2020-27866

high-risk
Published 2021-02-12

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Do I need to act?

!
90.8% chance of exploitation in next 30 days
EPSS score — higher than 9% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
ADJACENT_NETWORK / LOW complexity

Affected Products (19)

R7200 Firmware
R7350 Firmware
R7400 Firmware
R6330 Firmware
R6350 Firmware

Affected Vendors

Netgear

References (4)

Vendor Advisory https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnera...
Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
Vendor Advisory https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnera...
Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
66
/ 100
high-risk
Severity 27/34 · High
Exploitability 20/34 · Moderate
Exposure 19/34 · Moderate