CVE-2021-45619 [Critical] | Code Injection in Ex6250 Firmware

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects EX6200v2 before 1.0.1.86, EX6250 before 1.0.0.134, EX7700 before 1.0.0.216, EX8000 before 1.0.1.232, LBR1020 before 2.6.3.58, LBR20 before 2.6.3.50, R7800 before 1.0.2.80, R8900 before 1.0.5.26, R9000 before 1.0.5.26, RBS50Y before 2.7.3.22, WNR2000v5 before 1.0.0.76, XR700 before 1.0.1.36, EX6150v2 before 1.0.1.98, EX7300 before 1.0.2.158, EX7320 before 1.0.0.134, RAX10 before 1.0.2.88, RAX120 before 1.2.0.16, RAX70 before 1.0.2.88, EX6100v2 before 1.0.1.98, EX6400 before 1.0.2.158, EX7300v2 before 1.0.0.134, R6700AX before 1.0.2.88, RAX120v2 before 1.2.0.16, RAX78 before 1.0.2.88, EX6410 before 1.0.0.134, RBR10 before 2.7.3.22, RBR20 before 2.7.3.22, RBR350 before 4.3.4.7, RBR40 before 2.7.3.22, RBR50 before 2.7.3.22, EX6420 before 1.0.0.134, RBS10 before 2.7.3.22, RBS20 before 2.7.3.22, RBS350 before 4.3.4.7, RBS40 before 2.7.3.22, RBS50 before 2.7.3.22, EX6400v2 before 1.0.0.134, RBK12 before 2.7.3.22, RBK20 before 2.7.3.22, RBK352 before 4.3.4.7, RBK40 before 2.7.3.22, and RBK50 before 2.7.3.22.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	1.02%	2.49%	+1.47%
2	2026-01-06	0.86%	1.02%	+0.16%
3	2025-11-21	—	0.86%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

1.02%

2.49%

+1.47%

2026-01-06

0.86%

1.02%

+0.16%

2025-11-21

—

0.86%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.6	3.1	CRITICAL	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	6.0	[email protected]
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
10.0	2.0	HIGH	`AV:N/AC:L/Au:N/C:C/I:C/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	10.0	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.6

3.1

CRITICAL

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

6.0

[email protected]

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

10.0

2.0

HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:C): Complete confidentiality impact.
Integrity impact (I:C): Complete integrity impact.
Availability impact (A:C): Complete availability impact.

10.0

[email protected]

Affected software / configurations for CVE-2021-45619

Vendor	Product	Version	Raw CPE
netgear	ex6250_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex6250_firmware::::::::
netgear	ex7700_firmware	< 1.0.0.216	cpe:2.3:o:netgear:ex7700_firmware::::::::
netgear	ex8000_firmware	< 1.0.1.232	cpe:2.3:o:netgear:ex8000_firmware::::::::
netgear	lbr1020_firmware	< 2.6.3.58	cpe:2.3:o:netgear:lbr1020_firmware::::::::
netgear	lbr20_firmware	< 2.6.3.50	cpe:2.3:o:netgear:lbr20_firmware::::::::
netgear	r7800_firmware	< 1.0.2.80	cpe:2.3:o:netgear:r7800_firmware::::::::
netgear	r8900_firmware	< 1.0.5.26	cpe:2.3:o:netgear:r8900_firmware::::::::
netgear	rbs50y_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbs50y_firmware::::::::
netgear	wnr2000v5_firmware	< 1.0.0.76	cpe:2.3:o:netgear:wnr2000v5_firmware::::::::
netgear	xr700_firmware	< 1.0.1.36	cpe:2.3:o:netgear:xr700_firmware::::::::
netgear	ex6150v2_firmware	< 1.0.1.98	cpe:2.3:o:netgear:ex6150v2_firmware::::::::
netgear	ex7300_firmware	< 1.0.2.158	cpe:2.3:o:netgear:ex7300_firmware::::::::
netgear	ex7320_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex7320_firmware::::::::
netgear	rax10_firmware	< 1.0.2.88	cpe:2.3:o:netgear:rax10_firmware::::::::
netgear	rax120_firmware	< 1.2.0.16	cpe:2.3:o:netgear:rax120_firmware::::::::
netgear	rax70_firmware	< 1.0.2.88	cpe:2.3:o:netgear:rax70_firmware::::::::
netgear	ex6100v2_firmware	< 1.0.1.98	cpe:2.3:o:netgear:ex6100v2_firmware::::::::
netgear	ex6400_firmware	< 1.0.2.158	cpe:2.3:o:netgear:ex6400_firmware::::::::
netgear	ex7300v2_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex7300v2_firmware::::::::
netgear	r6700ax_firmware	< 1.0.2.88	cpe:2.3:o:netgear:r6700ax_firmware::::::::
netgear	rax120v2_firmware	< 1.2.0.16	cpe:2.3:o:netgear:rax120v2_firmware::::::::
netgear	rax78_firmware	< 1.0.2.88	cpe:2.3:o:netgear:rax78_firmware::::::::
netgear	ex6410_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex6410_firmware::::::::
netgear	rbr10_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbr10_firmware::::::::
netgear	rbr20_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbr20_firmware::::::::
netgear	rbr350_firmware	< 4.3.4.7	cpe:2.3:o:netgear:rbr350_firmware::::::::
netgear	rbr40_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbr40_firmware::::::::
netgear	rbr50_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbr50_firmware::::::::
netgear	ex6420_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex6420_firmware::::::::
netgear	rbs10_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbs10_firmware::::::::
netgear	rbs20_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbs20_firmware::::::::
netgear	rbs350_firmware	< 4.3.4.7	cpe:2.3:o:netgear:rbs350_firmware::::::::
netgear	rbs40_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbs40_firmware::::::::
netgear	rbs50_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbs50_firmware::::::::
netgear	ex6400v2_firmware	< 1.0.0.134	cpe:2.3:o:netgear:ex6400v2_firmware::::::::
netgear	rbk12_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbk12_firmware::::::::
netgear	rbk20_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbk20_firmware::::::::
netgear	rbk352_firmware	< 4.3.4.7	cpe:2.3:o:netgear:rbk352_firmware::::::::
netgear	rbk40_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbk40_firmware::::::::
netgear	rbk50_firmware	< 2.7.3.22	cpe:2.3:o:netgear:rbk50_firmware::::::::
netgear	ex6200v2_firmware	< 1.0.1.86	cpe:2.3:o:netgear:ex6200v2_firmware::::::::
netgear	r9000_firmware	< 1.0.5.26	cpe:2.3:o:netgear:r9000_firmware::::::::

References for CVE-2021-45619

URL	Tags
https://kb.netgear.com/000064492/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0435	Vendor Advisory

URL

CVE-2021-45619

Exploit prediction scoring system (EPSS) score for CVE-2021-45619

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45619

Weakness enumeration for CVE-2021-45619

Affected software / configurations for CVE-2021-45619

References for CVE-2021-45619