CVE-2018-21139 [High] | Information Disclosure in D1500 Firmware

Certain NETGEAR devices are affected by disclosure of sensitive information. This affects D1500 before 1.0.0.27, D500 before 1.0.0.27, D6100 before 1.0.0.58, D6200 before 1.1.00.30, D6220 before 1.0.0.46, D6400 before 1.0.0.82, D7000 before 1.0.1.68, D7000v2 before 1.0.0.51, D7800 before 1.0.1.42, D8500 before 1.0.3.42, DC112A before 1.0.0.40, DGN2200Bv4 before 1.0.0.102, DGN2200v4 before 1.0.0.102, JNR1010v2 before 1.1.0.54, JR6150 before 1.0.1.18, JWNR2010v5 before 1.1.0.54, PR2000 before 1.0.0.24, R6020 before 1.0.0.34, R6050 before 1.0.1.18, R6080 before 1.0.0.34, R6100 before 1.0.1.22, R6120 before 1.0.0.42, R6220 before 1.1.0.68, R6250 before 1.0.4.30, R6300v2 before 1.0.4.32, R6400 before 1.0.1.44, R6400v2 before 1.0.2.60, R6700 before 1.0.1.48, R6700v2 before 1.2.0.24, R6800 before 1.2.0.24, R6900 before 1.0.1.48, R6900P before 1.3.1.44, R6900v2 before 1.2.0.24, R7000 before 1.0.9.34, R7000P before 1.3.1.44, R7100LG before 1.0.0.48, R7300 before 1.0.0.68, R7500 before 1.0.0.124, R7500v2 before 1.0.3.38, R7900 before 1.0.2.16, R7900P before 1.4.1.24, R8000 before 1.0.4.18, R8000P before 1.4.1.24, R8300 before 1.0.2.122, R8500 before 1.0.2.122, WN3000RP before 1.0.0.68, WN3000RPv2 before 1.0.0.68, WNDR3400v3 before 1.0.1.18, WNDR3700v4 before 1.0.2.102, WNDR3700v5 before 1.1.0.54, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.56, WNDR4500v3 before 1.0.0.56, WNR1000v4 before 1.1.0.54, WNR2020 before 1.1.0.54, WNR2050 before 1.1.0.54, and WNR3500Lv2 before 1.2.0.54.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	0.40%	0.26%	-0.14%
2	2025-03-29	0.26%	0.40%	+0.14%
3	2025-03-17	—	0.26%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

0.40%

0.26%

-0.14%

2025-03-29

0.26%

0.40%

+0.14%

2025-03-17

—

0.26%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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: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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	3.9	3.6	[email protected]
7.1	3.0	HIGH	`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N` 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: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:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	4.2	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:P/I:N/A:N` 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:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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: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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

3.9

3.6

[email protected]

7.1

3.0

HIGH

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N 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: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:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

4.2

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N 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:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

10.0

2.9

[email protected]

Affected software / configurations for CVE-2018-21139

Vendor	Product	Version	Raw CPE
netgear	d1500_firmware	< 1.0.0.27	cpe:2.3:o:netgear:d1500_firmware::::::::
netgear	d500_firmware	< 1.0.0.27	cpe:2.3:o:netgear:d500_firmware::::::::
netgear	d6100_firmware	< 1.0.0.58	cpe:2.3:o:netgear:d6100_firmware::::::::
netgear	d6200_firmware	< 1.1.00.30	cpe:2.3:o:netgear:d6200_firmware::::::::
netgear	d6220_firmware	< 1.0.0.46	cpe:2.3:o:netgear:d6220_firmware::::::::
netgear	d6400_firmware	< 1.0.0.82	cpe:2.3:o:netgear:d6400_firmware::::::::
netgear	d7000_firmware	< 1.0.1.68	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	d7000_firmware	< 1.0.0.51	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	d7800_firmware	< 1.0.1.42	cpe:2.3:o:netgear:d7800_firmware::::::::
netgear	d8500_firmware	< 1.0.3.42	cpe:2.3:o:netgear:d8500_firmware::::::::
netgear	dc112a_firmware	< 1.0.0.40	cpe:2.3:o:netgear:dc112a_firmware::::::::
netgear	dgn2200b_firmware	< 1.0.0.102	cpe:2.3:o:netgear:dgn2200b_firmware::::::::
netgear	dgn2200_firmware	< 1.0.0.102	cpe:2.3:o:netgear:dgn2200_firmware::::::::
netgear	jnr1010_firmware	< 1.1.0.54	cpe:2.3:o:netgear:jnr1010_firmware::::::::
netgear	jr6150_firmware	< 1.0.1.18	cpe:2.3:o:netgear:jr6150_firmware::::::::
netgear	jwnr2010_firmware	< 1.1.0.54	cpe:2.3:o:netgear:jwnr2010_firmware::::::::
netgear	pr2000_firmware	< 1.0.0.24	cpe:2.3:o:netgear:pr2000_firmware::::::::
netgear	r6020_firmware	< 1.0.0.34	cpe:2.3:o:netgear:r6020_firmware::::::::
netgear	r6050_firmware	< 1.0.1.18	cpe:2.3:o:netgear:r6050_firmware::::::::
netgear	r6080_firmware	< 1.0.0.34	cpe:2.3:o:netgear:r6080_firmware::::::::
netgear	r6100_firmware	< 1.0.1.22	cpe:2.3:o:netgear:r6100_firmware::::::::
netgear	r6120_firmware	< 1.0.0.42	cpe:2.3:o:netgear:r6120_firmware::::::::
netgear	r6220_firmware	< 1.1.0.68	cpe:2.3:o:netgear:r6220_firmware::::::::
netgear	r6250_firmware	< 1.0.4.30	cpe:2.3:o:netgear:r6250_firmware::::::::
netgear	r6300_firmware	< 1.0.4.32	cpe:2.3:o:netgear:r6300_firmware::::::::
netgear	r6400_firmware	< 1.0.1.44	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6400_firmware	< 1.0.2.60	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6700_firmware	< 1.0.1.48	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6700_firmware	< 1.2.0.24	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6800_firmware	< 1.2.0.24	cpe:2.3:o:netgear:r6800_firmware::::::::
netgear	r6900_firmware	< 1.0.1.48	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r6900p_firmware	< 1.3.1.44	cpe:2.3:o:netgear:r6900p_firmware::::::::
netgear	r6900_firmware	< 1.2.0.24	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r7000_firmware	< 1.0.9.34	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r7000p_firmware	< 1.3.1.44	cpe:2.3:o:netgear:r7000p_firmware::::::::
netgear	r7100lg_firmware	< 1.0.0.48	cpe:2.3:o:netgear:r7100lg_firmware::::::::
netgear	r7300_firmware	< 1.0.0.68	cpe:2.3:o:netgear:r7300_firmware::::::::
netgear	r7500_firmware	< 1.0.0.124	cpe:2.3:o:netgear:r7500_firmware::::::::
netgear	r7500_firmware	< 1.0.3.38	cpe:2.3:o:netgear:r7500_firmware::::::::
netgear	r7900_firmware	< 1.0.2.16	cpe:2.3:o:netgear:r7900_firmware::::::::
netgear	r7900p_firmware	< 1.4.1.24	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	r8000_firmware	< 1.0.4.18	cpe:2.3:o:netgear:r8000_firmware::::::::
netgear	r8000p_firmware	< 1.4.1.24	cpe:2.3:o:netgear:r8000p_firmware::::::::
netgear	r8300_firmware	< 1.0.2.122	cpe:2.3:o:netgear:r8300_firmware::::::::
netgear	r8500_firmware	< 1.0.2.122	cpe:2.3:o:netgear:r8500_firmware::::::::
netgear	wn3000rp_firmware	< 1.0.0.68	cpe:2.3:o:netgear:wn3000rp_firmware::::::::
netgear	wndr3400_firmware	< 1.0.1.18	cpe:2.3:o:netgear:wndr3400_firmware::::::::
netgear	wndr3700_firmware	< 1.0.2.102	cpe:2.3:o:netgear:wndr3700_firmware::::::::
netgear	wndr3700_firmware	< 1.1.0.54	cpe:2.3:o:netgear:wndr3700_firmware::::::::
netgear	wndr4300_firmware	< 1.0.2.104	cpe:2.3:o:netgear:wndr4300_firmware::::::::
netgear	wndr4300_firmware	< 1.0.0.56	cpe:2.3:o:netgear:wndr4300_firmware::::::::
netgear	wndr4500_firmware	< 1.0.0.56	cpe:2.3:o:netgear:wndr4500_firmware::::::::
netgear	wnr1000_firmware	< 1.1.0.54	cpe:2.3:o:netgear:wnr1000_firmware::::::::
netgear	wnr2020_firmware	< 1.1.0.54	cpe:2.3:o:netgear:wnr2020_firmware::::::::
netgear	wnr2050_firmware	< 1.1.0.54	cpe:2.3:o:netgear:wnr2050_firmware::::::::
netgear	wnr3500l_firmware	< 1.2.0.54	cpe:2.3:o:netgear:wnr3500l_firmware::::::::

References for CVE-2018-21139

URL	Tags
https://kb.netgear.com/000060220/Security-Advisory-for-Sensitive-Information-Disclosure-on-Some-Routers-and-Smart-Cradles-PSV-2017-2198	Vendor Advisory

URL

CVE-2018-21139

Exploit prediction scoring system (EPSS) score for CVE-2018-21139

Common vulnerability scoring system (CVSS) metrics for CVE-2018-21139

Weakness enumeration for CVE-2018-21139

Affected software / configurations for CVE-2018-21139

References for CVE-2018-21139