CVE-2020-35795 [Critical] | Memory Corruption in Ac2100 Firmware

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects AC2100 before 1.2.0.72, AC2400 before 1.2.0.72, AC2600 before 1.2.0.72, CBK40 before 2.5.0.10, CBR40 before 2.5.0.10, D7800 before 1.0.1.58, EAX20 before 1.0.0.36, EAX80 before 1.0.1.62, EX7500 before 1.0.0.68, MK62 before 1.0.5.102, MR60 before 1.0.5.102, MS60 before 1.0.5.102, R6120 before 1.0.0.70, R6220 before 1.1.0.100, R6230 before 1.1.0.100, R6260 before 1.1.0.76, R6330 before 1.1.0.76, R6350 before 1.1.0.76, R6400 before 1.0.1.62, R6400v2 before 1.0.4.98, R6700 before 1.0.2.16, R6700v2 before 1.2.0.72, R6700v3 before 1.0.4.98, R6800 before 1.2.0.72, R6850 before 1.1.0.76, R6900P before 1.3.2.124, R6900 before 1.0.2.16, R6900v2 before 1.2.0.72, R7000 before 1.0.11.106, R7000P before 1.3.2.124, R7200 before 1.2.0.72, R7350 before 1.2.0.72, R7400 before 1.2.0.72, R7450 before 1.2.0.72, R7800 before 1.0.2.74, R7850 before 1.0.5.60, R7900 before 1.0.4.26, R7900P before 1.4.1.62, R7960P before 1.4.1.62, R8000 before 1.0.4.58, R8000P before 1.4.1.62, R8900 before 1.0.5.24, R9000 before 1.0.5.24, RAX120 before 1.0.1.136, RAX15 before 1.0.1.64, RAX20 before 1.0.1.64, RAX200 before 1.0.2.102, RAX45 before 1.0.2.64, RAX50 before 1.0.2.64, RAX75 before 1.0.3.102, RAX80 before 1.0.3.102, RBK12 before 2.6.1.44, RBR10 before 2.6.1.44, RBS10 before 2.6.1.44, RBK20 before 2.6.1.38, RBR20 before 2.6.1.36, RBS20 before 2.6.1.38, RBK40 before 2.6.1.38, RBR40 before 2.6.1.36, RBS40 before 2.6.1.38, RBK50 before 2.6.1.40, RBR50 before 2.6.1.40, RBS50 before 2.6.1.40, RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK842 before 3.2.16.6, RBR840 before 3.2.16.6, RBS840 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, RBS850 before 3.2.16.6, RS400 before 1.5.0.48, XR300 before 1.0.3.50, XR450 before 2.3.2.66, XR500 before 2.3.2.66, and XR700 before 1.0.1.34.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.56%	1.18%	+0.62%
2	2025-03-30	1.08%	0.56%	-0.52%
3	2025-03-29	—	1.08%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.56%

1.18%

+0.62%

2025-03-30

1.08%

0.56%

-0.52%

2025-03-29

—

1.08%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
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]
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]
7.5	2.0	HIGH	`AV:N/AC:L/Au:N/C:P/I:P/A:P` 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:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	10.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

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]

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]

7.5

2.0

HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

6.4

[email protected]

Affected software / configurations for CVE-2020-35795

Vendor	Product	Version	Raw CPE
netgear	ac2100_firmware	< 1.2.0.72	cpe:2.3:o:netgear:ac2100_firmware::::::::
netgear	ac2400_firmware	< 1.2.0.72	cpe:2.3:o:netgear:ac2400_firmware::::::::
netgear	ac2600_firmware	< 1.2.0.72	cpe:2.3:o:netgear:ac2600_firmware::::::::
netgear	cbk40_firmware	< 2.5.0.10	cpe:2.3:o:netgear:cbk40_firmware::::::::
netgear	cbr40_firmware	< 2.5.0.10	cpe:2.3:o:netgear:cbr40_firmware::::::::
netgear	d7800_firmware	< 1.0.1.58	cpe:2.3:o:netgear:d7800_firmware::::::::
netgear	eax20_firmware	< 1.0.0.36	cpe:2.3:o:netgear:eax20_firmware::::::::
netgear	eax80_firmware	< 1.0.1.62	cpe:2.3:o:netgear:eax80_firmware::::::::
netgear	ex7500_firmware	< 1.0.0.68	cpe:2.3:o:netgear:ex7500_firmware::::::::
netgear	mk62_firmware	< 1.0.5.102	cpe:2.3:o:netgear:mk62_firmware::::::::
netgear	mr60_firmware	< 1.0.5.102	cpe:2.3:o:netgear:mr60_firmware::::::::
netgear	ms60_firmware	< 1.0.5.102	cpe:2.3:o:netgear:ms60_firmware::::::::
netgear	r6120_firmware	< 1.0.0.70	cpe:2.3:o:netgear:r6120_firmware::::::::
netgear	r6220_firmware	< 1.1.0.100	cpe:2.3:o:netgear:r6220_firmware::::::::
netgear	r6230_firmware	< 1.1.0.100	cpe:2.3:o:netgear:r6230_firmware::::::::
netgear	r6260_firmware	< 1.1.0.76	cpe:2.3:o:netgear:r6260_firmware::::::::
netgear	r6330_firmware	< 1.1.0.76	cpe:2.3:o:netgear:r6330_firmware::::::::
netgear	r6350_firmware	< 1.1.0.76	cpe:2.3:o:netgear:r6350_firmware::::::::
netgear	r6400_firmware	< 1.0.1.62	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6400v2_firmware	< 1.0.4.98	cpe:2.3:o:netgear:r6400v2_firmware::::::::
netgear	r6700_firmware	< 1.0.2.16	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6700v2_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r6700v2_firmware::::::::
netgear	r6700v3_firmware	< 1.0.4.98	cpe:2.3:o:netgear:r6700v3_firmware::::::::
netgear	r6800_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r6800_firmware::::::::
netgear	r6850_firmware	< 1.1.0.76	cpe:2.3:o:netgear:r6850_firmware::::::::
netgear	r6900p_firmware	< 1.3.2.124	cpe:2.3:o:netgear:r6900p_firmware::::::::
netgear	r6900_firmware	< 1.0.2.16	cpe:2.3:o:netgear:r6900_firmware::::::::
netgear	r6900v2_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r6900v2_firmware::::::::
netgear	r7000_firmware	< 1.0.11.106	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r7000p_firmware	< 1.3.2.124	cpe:2.3:o:netgear:r7000p_firmware::::::::
netgear	r7200_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r7200_firmware::::::::
netgear	r7350_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r7350_firmware::::::::
netgear	r7400_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r7400_firmware::::::::
netgear	r7450_firmware	< 1.2.0.72	cpe:2.3:o:netgear:r7450_firmware::::::::
netgear	r7800_firmware	< 1.0.2.74	cpe:2.3:o:netgear:r7800_firmware::::::::
netgear	r7850_firmware	< 1.0.5.60	cpe:2.3:o:netgear:r7850_firmware::::::::
netgear	r7900_firmware	< 1.0.4.26	cpe:2.3:o:netgear:r7900_firmware::::::::
netgear	r7900p_firmware	< 1.4.1.62	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	r7960p_firmware	< 1.4.1.62	cpe:2.3:o:netgear:r7960p_firmware::::::::
netgear	r8000_firmware	< 1.0.4.58	cpe:2.3:o:netgear:r8000_firmware::::::::
netgear	r8000p_firmware	< 1.4.1.62	cpe:2.3:o:netgear:r8000p_firmware::::::::
netgear	r8900_firmware	< 1.0.5.24	cpe:2.3:o:netgear:r8900_firmware::::::::
netgear	r9000_firmware	< 1.0.5.24	cpe:2.3:o:netgear:r9000_firmware::::::::
netgear	rax120_firmware	< 1.0.1.136	cpe:2.3:o:netgear:rax120_firmware::::::::
netgear	rax15_firmware	< 1.0.1.64	cpe:2.3:o:netgear:rax15_firmware::::::::
netgear	rax20_firmware	< 1.0.1.64	cpe:2.3:o:netgear:rax20_firmware::::::::
netgear	rax200_firmware	< 1.0.2.102	cpe:2.3:o:netgear:rax200_firmware::::::::
netgear	rax45_firmware	< 1.0.2.64	cpe:2.3:o:netgear:rax45_firmware::::::::
netgear	rax50_firmware	< 1.0.2.64	cpe:2.3:o:netgear:rax50_firmware::::::::
netgear	rax75_firmware	< 1.0.3.102	cpe:2.3:o:netgear:rax75_firmware::::::::
netgear	rax80_firmware	< 1.0.3.102	cpe:2.3:o:netgear:rax80_firmware::::::::
netgear	rbk12_firmware	< 2.6.1.44	cpe:2.3:o:netgear:rbk12_firmware::::::::
netgear	rbr10_firmware	< 2.6.1.44	cpe:2.3:o:netgear:rbr10_firmware::::::::
netgear	rbs10_firmware	< 2.6.1.44	cpe:2.3:o:netgear:rbs10_firmware::::::::
netgear	rbk20_firmware	< 2.6.1.38	cpe:2.3:o:netgear:rbk20_firmware::::::::
netgear	rbr20_firmware	< 2.6.1.36	cpe:2.3:o:netgear:rbr20_firmware::::::::
netgear	rbs20_firmware	< 2.6.1.38	cpe:2.3:o:netgear:rbs20_firmware::::::::
netgear	rbk40_firmware	< 2.6.1.38	cpe:2.3:o:netgear:rbk40_firmware::::::::
netgear	rbr40_firmware	< 2.6.1.36	cpe:2.3:o:netgear:rbr40_firmware::::::::
netgear	rbs40_firmware	< 2.6.1.38	cpe:2.3:o:netgear:rbs40_firmware::::::::
netgear	rbk50_firmware	< 2.6.1.40	cpe:2.3:o:netgear:rbk50_firmware::::::::
netgear	rbr50_firmware	< 2.6.1.40	cpe:2.3:o:netgear:rbr50_firmware::::::::
netgear	rbs50_firmware	< 2.6.1.40	cpe:2.3:o:netgear:rbs50_firmware::::::::
netgear	rbk752_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbk752_firmware::::::::
netgear	rbr750_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbr750_firmware::::::::
netgear	rbs750_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbs750_firmware::::::::
netgear	rbk842_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbk842_firmware::::::::
netgear	rbr840_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbr840_firmware::::::::
netgear	rbs840_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbs840_firmware::::::::
netgear	rbk852_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbk852_firmware::::::::
netgear	rbr850_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbr850_firmware::::::::
netgear	rbs850_firmware	< 3.2.16.6	cpe:2.3:o:netgear:rbs850_firmware::::::::
netgear	rs400_firmware	< 1.5.0.48	cpe:2.3:o:netgear:rs400_firmware::::::::
netgear	xr300_firmware	< 1.0.3.50	cpe:2.3:o:netgear:xr300_firmware::::::::
netgear	xr450_firmware	< 2.3.2.66	cpe:2.3:o:netgear:xr450_firmware::::::::
netgear	xr500_firmware	< 2.3.2.66	cpe:2.3:o:netgear:xr500_firmware::::::::
netgear	xr700_firmware	< 1.0.1.34	cpe:2.3:o:netgear:xr700_firmware::::::::

References for CVE-2020-35795

URL	Tags
https://kb.netgear.com/000062735/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-Range-Extenders-and-Orbi-WiFi-Systems-PSV-2020-0154	Vendor Advisory

URL

CVE-2020-35795

Exploit prediction scoring system (EPSS) score for CVE-2020-35795

Common vulnerability scoring system (CVSS) metrics for CVE-2020-35795

Weakness enumeration for CVE-2020-35795

Affected software / configurations for CVE-2020-35795

References for CVE-2020-35795