What’s Vulnerable › Vulnerabilities

CVE-2021-35973

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-30 · updated 2026-06-17
• Weakness: CWE-697

Description

NETGEAR WAC104 devices before 1.0.4.15 are affected by an authentication bypass vulnerability in /usr/sbin/mini_httpd, allowing an unauthenticated attacker to invoke any action by adding the &currentsetting.htm substring to the HTTP query, a related issue to CVE-2020-27866. This directly allows the attacker to change the web UI password, and eventually to enable debug mode (telnetd) and gain a shell on the device as the admin limited-user account (however, escalation to root is simple because of weak permissions on the /etc/ directory).

Affected products

• NETGEAR Wac104 Firmware: before 1.0.4.15 — fixed in 1.0.4.15

How to fix

Upgrade to a fixed version: NETGEAR Wac104 Firmware 1.0.4.15. Check the vendor advisory for mitigations.

References

• https://gynvael.coldwind.pl/?lang=en&id=736
• https://kb.netgear.com/000063785/Security-Advisory-for-Authentication-Bypass-on-WAC104-PSV-2021-0075
• https://gynvael.coldwind.pl/?lang=en&id=736
• https://kb.netgear.com/000063785/Security-Advisory-for-Authentication-Bypass-on-WAC104-PSV-2021-0075

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