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CVE-2021-34982

Published: May 7, 2024Updated: Aug 14, 2025 Sources: CVE List NVD BDUCWE-121
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.6%
Top 57.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. When parsing the strings file, the process does not properly validate 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 root. . Was ZDI-CAN-13709.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-121CWE-787

Affected Products

RS400NETGEARNetworking Infrastructure
EX6120NETGEARNetworking Infrastructure
EX6130NETGEARNetworking Infrastructure
EX7500NETGEARNetworking Infrastructure
R6400v2NETGEARNetworking Infrastructure
netgearcommercialUSNetworking Infrastructureaka net gear
and 83 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159
kb.netgear.com
https://www.zerodayinitiative.com/advisories/ZDI-21-1274/
zerodayinitiative.com
https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159
kb.netgear.com

Timeline

Published
May 7, 2024
Last Updated
Aug 14, 2025

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