What’s Vulnerable › Vulnerabilities

CVE-2020-15634

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-20 · updated 2026-06-17
• Weakness: CWE-134

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of string table file uploads. The issue results from the lack of proper validation of a user-supplied string before using it as a format specifier. An attacker can leverage this vulnerability to execute code in the context of the web server. Was ZDI-CAN-9755.

Affected products

• NETGEAR R6700: before 1.0.4.98 — fixed in 1.0.4.98

How to fix

Upgrade to a fixed version: NETGEAR R6700 1.0.4.98. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000062126/Security-Advisory-for-Pre-Authentication-Command-Injection-on-R6700v3-PSV-2020-0189
• https://www.zerodayinitiative.com/advisories/ZDI-20-935/
• https://kb.netgear.com/000062126/Security-Advisory-for-Pre-Authentication-Command-Injection-on-R6700v3-PSV-2020-0189
• https://www.zerodayinitiative.com/advisories/ZDI-20-935/

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