Certain NETGEAR devices are affected by a buffer overflow by an authenticated user.

published 2021-12-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32292

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects EX6000 before 1.0.0.38, EX6120 before 1.0.0.48, EX6130 before 1.0.0.30, R6300v2 before 1.0.4.52, R6400 before 1.0.1.52, R7000 before 1.0.11.126, R7900 before 1.0.4.30, R8000 before 1.0.4.52, R7000P before 1.3.2.124, R8000P before 1.4.1.50, RAX80 before 1.0.3.88, R6900P before 1.3.2.124, R7900P before 1.4.1.50, and RAX75 before 1.0.3.88.

Patch / fix

fixed in 14 links 1

netgear ex6000_firmware 1.0.0.38
netgear ex6120_firmware 1.0.0.48
netgear ex6130_firmware 1.0.0.30
netgear r6300v2_firmware 1.0.4.52
netgear r6400_firmware 1.0.1.52
netgear r7000_firmware 1.0.11.126
netgear r7900_firmware 1.0.4.30
netgear r8000_firmware 1.0.4.52
netgear r8000p_firmware 1.4.1.50
netgear r7000p_firmware 1.3.2.124
netgear rax80_firmware 1.0.3.88
netgear rax75_firmware 1.0.3.88
netgear r6900p_firmware 1.3.2.124
netgear r7900p_firmware 1.4.1.50

kb.netgear.com/000064446/Security-Advisory-for-Post-Authentication-Buffer… advisory

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	CVSS:3.1/AC:L/AV:L/A:H/C:L/I:L/PR:H/S:C/UI:N
CNA	3.1	7.3	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

kb.netgear.com /000064446/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-and-Extenders-PSV-2019-00
patch, vendor-advisory

Sources

CVE List CVE-2021-45526
NVD CVE-2021-45526

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary