Vulnerability in NETGEAR Wac104
CVE-2021-35973
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 ¤tsetting.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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gynvael.coldwind.pl/ (Exploit, Third Party Advisory)
- kb.netgear.com/000063785/Security-Advisory-for-Authentication-Bypass-on-WAC104-… (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-35973?
- CVE-2021-35973 is a critical-severity vulnerability in NETGEAR Wac104, classified under Incorrect Comparison. CVSS score: 9.8/10. Published 2021-06-30.
- How severe is CVE-2021-35973?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-35973 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.