What’s Vulnerable › Vulnerabilities

CVE-2021-45608

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-26 · updated 2026-06-17
• Weakness: CWE-190

Description

Certain D-Link, Edimax, NETGEAR, TP-Link, Tenda, and Western Digital devices are affected by an integer overflow by an unauthenticated attacker. Remote code execution from the WAN interface (TCP port 20005) cannot be ruled out; however, exploitability was judged to be of "rather significant complexity" but not "impossible." The overflow is in SoftwareBus_dispatchNormalEPMsgOut in the KCodes NetUSB kernel module. Affected NETGEAR devices are D7800 before 1.0.1.68, R6400v2 before 1.0.4.122, and R6700v3 before 1.0.4.122.

Affected products

• NETGEAR D7800 Firmware: before 1.0.1.68 — fixed in 1.0.1.68
• NETGEAR R6400V2 Firmware: before 1.0.4.122 — fixed in 1.0.4.122
• NETGEAR R6700V3 Firmware: before 1.0.4.122 — fixed in 1.0.4.122

How to fix

Upgrade to a fixed version: NETGEAR D7800 Firmware 1.0.1.68; NETGEAR R6400V2 Firmware 1.0.4.122; NETGEAR R6700V3 Firmware 1.0.4.122. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000064437/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0278
• https://www.sentinelone.com/labs/cve-2021-45608-netusb-rce-flaw-in-millions-of-end-user-routers/
• https://kb.netgear.com/000064437/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0278
• https://www.sentinelone.com/labs/cve-2021-45608-netusb-rce-flaw-in-millions-of-end-user-routers/

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