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.

• CWE-787

• https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129Third Party Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-1116/Third Party Advisory
• https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129Third Party Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-1116/Third Party Advisory

Published

May 7, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-34941This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34942This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34943This vulnerability allows remote attackers to disclose sensi…3.3
• CVE-2021-34944This vulnerability allows remote attackers to disclose sensi…3.3
• CVE-2021-34945This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34946This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34948Foxit PDF Reader Square Annotation Use-After-Free Remote Cod…7.8
• CVE-2021-34949Foxit PDF Reader Annotation Out-Of-Bounds Read Information D…5.5
• CVE-2021-3495An incorrect access control flaw was found in the kiali-oper…8.8
• CVE-2021-34950Foxit PDF Reader Annotation Out-Of-Bounds Read Remote Code E…7.8
• CVE-2021-34951Foxit PDF Reader Annotation Use of Uninitialized Variable In…3.3
• CVE-2021-34952Foxit PDF Reader Annotation Use-After-Free Remote Code Execu…7.8