Auth bypass in NETGEAR Ac2100
CVE-2021-34865
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR 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 vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% 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)
References
- www.zerodayinitiative.com/advisories/ZDI-21-1051/ (VDB Entry, Third Party Advisory)
- kb.netgear.com/000063955/Security-Advisory-for-Authentication-Bypass-Vulnerabil… (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34865?
- CVE-2021-34865 is a high-severity vulnerability in NETGEAR Ac2100, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-01-25.
- How severe is CVE-2021-34865?
- High severity. CVSS v3 base score is 8.8 out of 10.