Buffer overflow in NETGEAR D7800
CVE-2021-34947
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.
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: 0.005 (43.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-21-1116/ (x_research-advisory, Third Party Advisory)
- kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overfl… (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34947?
- CVE-2021-34947 is a high-severity vulnerability in NETGEAR D7800, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2024-05-07.
- How severe is CVE-2021-34947?
- High severity. CVSS v3 base score is 8.8 out of 10.