Buffer overflow in NETGEAR D6220
CVE-2021-34982
NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. When parsing the strings file, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13709.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-21-1274/ (x_research-advisory, Third Party Advisory)
- kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overfl… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34982?
- CVE-2021-34982 is a high-severity vulnerability in NETGEAR D6220, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2024-05-07.
- How severe is CVE-2021-34982?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-34982 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.