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CVE-2020-15635 Details

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700 V1.0.4.84_10.0.58 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the acsd service, which listens on TCP port 5916 by default. The issue results from the lack of proper validation of 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 the admin user. Was ZDI-CAN-9853.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://kb.netgear.com/000062127/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-R6700v3-PSV-2020-0202	CVE	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-936/	CVE	Third Party AdvisoryVDB Entry
https://kb.netgear.com/000062127/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-R6700v3-PSV-2020-0202	[email protected]	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-936/	[email protected]	Third Party AdvisoryVDB Entry

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-121	Stack-based Buffer Overflow	[email protected]

Affected Products

Product	Versions
netgear r6700 firmware	< 1.0.4.98
CPE cpe:2.3:o:netgear:r6700_firmware:::::::: Remediation No remediation found in references.
netgear r6700	v3
CPE cpe:2.3:h:netgear:r6700:v3:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Aug 24, 2020	Initial Analysis	[email protected]