High severity8.8NVD Advisory· Published May 7, 2024· Updated Jun 17, 2026
CVE-2021-34947
CVE-2021-34947
Description
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.
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Affected products
43Patches
Vulnerability mechanics
References
2- kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129nvdThird Party Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-1116/nvdThird Party Advisory
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