CVE-2021-38534 [Medium] | XSS in D3600 Firmware

Certain NETGEAR devices are affected by stored XSS. This affects D3600 before 1.0.0.76, D6000 before 1.0.0.76, D6100 before 1.0.0.60, D6200 before 1.1.00.36, D6220 before 1.0.0.52, D6400 before 1.0.0.86, D7000 before 1.0.1.70, D7000v2 before 1.0.0.53, D8500 before 1.0.3.44, DC112A before 1.0.0.42, DGN2200v4 before 1.0.0.110, DGND2200Bv4 before 1.0.0.109, DM200 before 1.0.0.61, JR6150 before 1.0.1.18, PR2000 before 1.0.0.28, R6020 before 1.0.0.42, R6050 before 1.0.1.18, R6080 before 1.0.0.42, R6220 before 1.1.0.80, R6230 before 1.1.0.80, R6250 before 1.0.4.34, R6260 before 1.1.0.64, R6300v2 before 1.0.4.34, R6400 before 1.0.1.46, R6400v2 before 1.0.2.62, R6700 before 1.0.2.6, R6700v2 before 1.2.0.36, R6700v3 before 1.0.2.62, R6800 before 1.2.0.36, R6900 before 1.0.2.4, R6900P before 1.3.1.64, R6900v2 before 1.2.0.36, R7000 before 1.0.9.60, R7000P before 1.3.1.64, R7100LG before 1.0.0.50, R7300DST before 1.0.0.70, R7450 before 1.2.0.36, R7900 before 1.0.3.8, R7900P before 1.4.1.50, R8000 before 1.0.4.28, R8000P before 1.4.1.50, R8300 before 1.0.2.130, R8500 before 1.0.2.130, WNDR3400v3 before 1.0.1.24, WNR2020 before 1.1.0.62, WNR3500Lv2 before 1.2.0.62, XR450 before 2.3.2.40, and XR500 before 2.3.2.40.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-11-21	0.31%	0.25%	-0.06%
2	2025-11-18	0.25%	0.31%	+0.06%
3	2025-08-21	—	0.25%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-11-21

0.31%

0.25%

-0.06%

2025-11-18

0.25%

0.31%

+0.06%

2025-08-21

—

0.25%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.1	3.1	MEDIUM	`CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L` 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:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	0.7	3.4	[email protected]
4.8	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N` 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:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	1.7	2.7	[email protected]
3.5	2.0	LOW	`AV:N/AC:M/Au:S/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	6.8	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.1

3.1

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L 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:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

0.7

3.4

[email protected]

4.8

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N 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:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

1.7

2.7

[email protected]

3.5

2.0

LOW

AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

6.8

2.9

[email protected]

Affected software / configurations for CVE-2021-38534

Vendor	Product	Version	Raw CPE
netgear	d3600_firmware	< 1.0.0.76	cpe:2.3:o:netgear:d3600_firmware::::::::
netgear	d6000_firmware	< 1.0.0.76	cpe:2.3:o:netgear:d6000_firmware::::::::
netgear	d6100_firmware	< 1.0.0.60	cpe:2.3:o:netgear:d6100_firmware::::::::
netgear	d6200_firmware	< 1.1.00.36	cpe:2.3:o:netgear:d6200_firmware::::::::
netgear	d6220_firmware	< 1.0.0.52	cpe:2.3:o:netgear:d6220_firmware::::::::
netgear	d6400_firmware	< 1.0.0.86	cpe:2.3:o:netgear:d6400_firmware::::::::
netgear	d7000_firmware	< 1.0.1.70	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	d7000_firmware	< 1.0.0.53	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	d8500_firmware	< 1.0.3.44	cpe:2.3:o:netgear:d8500_firmware::::::::
netgear	dc112a_firmware	< 1.0.0.42	cpe:2.3:o:netgear:dc112a_firmware::::::::
netgear	dgn2200_firmware	< 1.0.0.110	cpe:2.3:o:netgear:dgn2200_firmware::::::::
netgear	dgnd2200b_firmware	< 1.0.0.109	cpe:2.3:o:netgear:dgnd2200b_firmware::::::::
netgear	dm200_firmware	< 1.0.0.61	cpe:2.3:o:netgear:dm200_firmware::::::::
netgear	jr6150_firmware	< 1.0.1.18	cpe:2.3:o:netgear:jr6150_firmware::::::::
netgear	pr2000_firmware	< 1.0.0.28	cpe:2.3:o:netgear:pr2000_firmware::::::::
netgear	r6020_firmware	< 1.0.0.42	cpe:2.3:o:netgear:r6020_firmware::::::::
netgear	r6050_firmware	< 1.0.1.18	cpe:2.3:o:netgear:r6050_firmware::::::::
netgear	r6080_firmware	< 1.0.0.42	cpe:2.3:o:netgear:r6080_firmware::::::::
netgear	r6220_firmware	< 1.1.0.80	cpe:2.3:o:netgear:r6220_firmware::::::::
netgear	r6230_firmware	< 1.1.0.80	cpe:2.3:o:netgear:r6230_firmware::::::::
netgear	r6250_firmware	< 1.0.4.34	cpe:2.3:o:netgear:r6250_firmware::::::::
netgear	r6260_firmware	< 1.1.0.64	cpe:2.3:o:netgear:r6260_firmware::::::::
netgear	r6300_firmware	< 1.0.4.34	cpe:2.3:o:netgear:r6300_firmware::::::::
netgear	r6400_firmware	< 1.0.1.46	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6400_firmware	< 1.0.2.62	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6700_firmware	< 1.0.2.6	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6700_firmware	< 1.2.0.36	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6700_firmware	< 1.0.2.62	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6800_firmware	< 1.2.0.36	cpe:2.3:o:netgear:r6800_firmware::::::::
netgear	r6900_firmware	< 1.0.2.4	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r6900p_firmware	< 1.3.1.64	cpe:2.3:o:netgear:r6900p_firmware::::::::
netgear	r6900_firmware	< 1.2.0.36	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r7000_firmware	< 1.0.9.60	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r7000p_firmware	< 1.3.1.64	cpe:2.3:o:netgear:r7000p_firmware::::::::
netgear	r7100lg_firmware	< 1.0.0.50	cpe:2.3:o:netgear:r7100lg_firmware::::::::
netgear	r7300dst_firmware	< 1.0.0.70	cpe:2.3:o:netgear:r7300dst_firmware::::::::
netgear	r7450_firmware	< 1.2.0.36	cpe:2.3:o:netgear:r7450_firmware::::::::
netgear	r7900_firmware	< 1.0.3.8	cpe:2.3:o:netgear:r7900_firmware::::::::
netgear	r7900p_firmware	< 1.4.1.50	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	r8000_firmware	< 1.0.4.28	cpe:2.3:o:netgear:r8000_firmware::::::::
netgear	r8000p_firmware	< 1.4.1.50	cpe:2.3:o:netgear:r8000p_firmware::::::::
netgear	r8300_firmware	< 1.0.2.130	cpe:2.3:o:netgear:r8300_firmware::::::::
netgear	r8500_firmware	< 1.0.2.130	cpe:2.3:o:netgear:r8500_firmware::::::::
netgear	wndr3400_firmware	< 1.0.1.24	cpe:2.3:o:netgear:wndr3400_firmware::::::::
netgear	wnr2020_firmware	< 1.1.0.62	cpe:2.3:o:netgear:wnr2020_firmware::::::::
netgear	wnr3500l_firmware	< 1.2.0.62	cpe:2.3:o:netgear:wnr3500l_firmware::::::::
netgear	xr450_firmware	< 2.3.2.40	cpe:2.3:o:netgear:xr450_firmware::::::::
netgear	xr500_firmware	< 2.3.2.40	cpe:2.3:o:netgear:xr500_firmware::::::::

References for CVE-2021-38534

URL	Tags
https://kb.netgear.com/000063758/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-and-Gateways-PSV-2018-0244	Vendor Advisory

URL

CVE-2021-38534

Exploit prediction scoring system (EPSS) score for CVE-2021-38534

Common vulnerability scoring system (CVSS) metrics for CVE-2021-38534

Weakness enumeration for CVE-2021-38534

Affected software / configurations for CVE-2021-38534

References for CVE-2021-38534