CVE-2020-35787 [High] | Memory Corruption in D3600 Firmware

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D3600 before 1.0.0.76, D6000 before 1.0.0.76, D6200 before 1.1.00.36, D7000 before 1.0.1.70, EX6200v2 before 1.0.1.78, EX7000 before 1.0.1.78, EX8000 before 1.0.1.186, 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, R6120 before 1.0.0.46, R6220 before 1.1.0.80, R6260 before 1.1.0.64, R6300v2 before 1.0.4.34, R6700 before 1.0.2.6, R6700v2 before 1.2.0.36, 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 1.0.9.42, R7000P before 1.3.1.64, R7800 before 1.0.2.60, R8900 before 1.0.4.12, R9000 before 1.0.4.12, and XR500 before 2.3.2.40.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	0.35%	0.14%	-0.21%
2	2025-03-29	0.14%	0.35%	+0.21%
3	2025-03-17	—	0.14%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

0.35%

0.14%

-0.21%

2025-03-29

0.14%

0.35%

+0.21%

2025-03-17

—

0.14%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.0	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/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:L) A normal user session is enough; they don’t have to be admin. 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.	2.1	5.9	[email protected]
8.0	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/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:L) A normal user session is enough; they don’t have to be admin. 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.	2.1	5.9	[email protected]
5.2	2.0	MEDIUM	`AV:A/AC:L/Au:S/C:P/I:P/A:P` Click to expand Access vector (AV:A) Requires access to an adjacent network segment. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	5.1	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.0

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/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:L): A normal user session is enough; they don’t have to be admin.
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.

2.1

5.9

[email protected]

8.0

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/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:L): A normal user session is enough; they don’t have to be admin.
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.

2.1

5.9

[email protected]

5.2

2.0

MEDIUM

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

Access vector (AV:A): Requires access to an adjacent network segment.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

5.1

6.4

[email protected]

Affected software / configurations for CVE-2020-35787

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	d6200_firmware	< 1.1.00.36	cpe:2.3:o:netgear:d6200_firmware::::::::
netgear	d7000_firmware	< 1.0.1.70	cpe:2.3:o:netgear:d7000_firmware::::::::
netgear	ex6200_firmware	< 1.0.1.78	cpe:2.3:o:netgear:ex6200_firmware::::::::
netgear	ex7000_firmware	< 1.0.1.78	cpe:2.3:o:netgear:ex7000_firmware::::::::
netgear	ex8000_firmware	< 1.0.1.186	cpe:2.3:o:netgear:ex8000_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	r6120_firmware	< 1.0.0.46	cpe:2.3:o:netgear:r6120_firmware::::::::
netgear	r6220_firmware	< 1.1.0.80	cpe:2.3:o:netgear:r6220_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	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	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	< 1.0.9.42	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r7000p_firmware	< 1.3.1.64	cpe:2.3:o:netgear:r7000p_firmware::::::::
netgear	r7800_firmware	< 1.0.2.60	cpe:2.3:o:netgear:r7800_firmware::::::::
netgear	r8900_firmware	< 1.0.4.12	cpe:2.3:o:netgear:r8900_firmware::::::::
netgear	r9000_firmware	< 1.0.4.12	cpe:2.3:o:netgear:r9000_firmware::::::::
netgear	xr500_firmware	< 2.3.2.40	cpe:2.3:o:netgear:xr500_firmware::::::::

References for CVE-2020-35787

URL	Tags
https://kb.netgear.com/000062710/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-and-Range-Extenders-PSV-2018-0379	Vendor Advisory

URL

CVE-2020-35787

Exploit prediction scoring system (EPSS) score for CVE-2020-35787

Common vulnerability scoring system (CVSS) metrics for CVE-2020-35787

Weakness enumeration for CVE-2020-35787

Affected software / configurations for CVE-2020-35787

References for CVE-2020-35787