CVE-2021-38537 [Medium] | XSS in D6200 Firmware

Certain NETGEAR devices are affected by stored XSS. This affects D6200 before 1.1.00.40, D7000 before 1.0.1.78, R6020 before 1.0.0.48, R6080 before 1.0.0.48, R6120 before 1.0.0.66, R6260 before 1.1.0.78, R6700v2 before 1.2.0.76, R6800 before 1.2.0.76, R6900v2 before 1.2.0.76, R6850 before 1.1.0.78, R7200 before 1.2.0.76, R7350 before 1.2.0.76, R7400 before 1.2.0.76, R7450 before 1.2.0.76, AC2100 before 1.2.0.76, AC2400 before 1.2.0.76, AC2600 before 1.2.0.76, and RAX40 before 1.0.3.62.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.20%	0.36%	+0.16%
2	2025-11-21	0.25%	0.20%	-0.05%
3	2025-11-18	—	0.25%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.20%

0.36%

+0.16%

2025-11-21

0.25%

0.20%

-0.05%

2025-11-18

—

0.25%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.2	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. 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.	1.1	2.7	[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

4.2

3.1

MEDIUM

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

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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.

1.1

2.7

[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-2021-38537

Vendor	Product	Version	Raw CPE
netgear	d6200_firmware	< 1.1.00.40	cpe:2.3:o:netgear:d6200_firmware::::::::
netgear	d7000_firmware	< 1.0.1.78	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	r6020_firmware	< 1.0.0.48	cpe:2.3:o:netgear:r6020_firmware::::::::
netgear	r6080_firmware	< 1.0.0.48	cpe:2.3:o:netgear:r6080_firmware::::::::
netgear	r6120_firmware	< 1.0.0.66	cpe:2.3:o:netgear:r6120_firmware::::::::
netgear	r6260_firmware	< 1.1.0.78	cpe:2.3:o:netgear:r6260_firmware::::::::
netgear	r6700_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6800_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r6800_firmware::::::::
netgear	r6900_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r6850_firmware	< 1.1.0.78	cpe:2.3:o:netgear:r6850_firmware::::::::
netgear	r7200_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r7200_firmware::::::::
netgear	r7350_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r7350_firmware::::::::
netgear	r7400_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r7400_firmware::::::::
netgear	r7450_firmware	< 1.2.0.76	cpe:2.3:o:netgear:r7450_firmware::::::::
netgear	ac2100_firmware	< 1.2.0.76	cpe:2.3:o:netgear:ac2100_firmware::::::::
netgear	ac2400_firmware	< 1.2.0.76	cpe:2.3:o:netgear:ac2400_firmware::::::::
netgear	ac2600_firmware	< 1.2.0.76	cpe:2.3:o:netgear:ac2600_firmware::::::::
netgear	rax40_firmware	< 1.0.3.62	cpe:2.3:o:netgear:rax40_firmware::::::::

References for CVE-2021-38537

URL	Tags
https://kb.netgear.com/000063775/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-and-Gateways-PSV-2019-0245	Vendor Advisory

URL

CVE-2021-38537

Exploit prediction scoring system (EPSS) score for CVE-2021-38537

Common vulnerability scoring system (CVSS) metrics for CVE-2021-38537

Weakness enumeration for CVE-2021-38537

Affected software / configurations for CVE-2021-38537

References for CVE-2021-38537