CVE-2021-29080 [High] | Security Vulnerability in Rbk852 Firmware

Certain NETGEAR devices are affected by password reset by an unauthenticated attacker. This affects RBK852 before 3.2.10.11, RBK853 before 3.2.10.11, RBR854 before 3.2.10.11, RBR850 before 3.2.10.11, RBS850 before 3.2.10.11, CBR40 before 2.5.0.10, R7000 before 1.0.11.116, R6900P before 1.3.2.126, R7900 before 1.0.4.38, R7960P before 1.4.1.66, R8000 before 1.0.4.66, R7900P before 1.4.1.66, R8000P before 1.4.1.66, RAX75 before 1.0.3.102, RAX80 before 1.0.3.102, and R7000P before 1.3.2.126.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.09%	0.42%	+0.33%
2	2025-03-30	0.23%	0.09%	-0.14%
3	2025-03-29	—	0.23%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.09%

0.42%

+0.33%

2025-03-30

0.23%

0.09%

-0.14%

2025-03-29

—

0.23%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	2.8	5.2	[email protected]
8.1	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	2.8	5.2	[email protected]
4.8	2.0	MEDIUM	`AV:A/AC:L/Au:N/C:P/I:P/A:N` 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:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	6.5	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

2.8

5.2

[email protected]

8.1

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

2.8

5.2

[email protected]

4.8

2.0

MEDIUM

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

6.5

4.9

[email protected]

Affected software / configurations for CVE-2021-29080

Vendor	Product	Version	Raw CPE
netgear	rbk852_firmware	< 3.2.10.11	cpe:2.3:o:netgear:rbk852_firmware::::::::
netgear	rbk853_firmware	< 3.2.10.11	cpe:2.3:o:netgear:rbk853_firmware::::::::
netgear	rbr854_firmware	< 3.2.10.11	cpe:2.3:o:netgear:rbr854_firmware::::::::
netgear	rbr850_firmware	< 3.2.10.11	cpe:2.3:o:netgear:rbr850_firmware::::::::
netgear	rbs850_firmware	< 3.2.10.11	cpe:2.3:o:netgear:rbs850_firmware::::::::
netgear	cbr40_firmware	< 2.5.0.10	cpe:2.3:o:netgear:cbr40_firmware::::::::
netgear	r7000_firmware	< 1.0.11.116	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r6900p_firmware	< 1.3.2.126	cpe:2.3:o:netgear:r6900p_firmware::::::::
netgear	r7900_firmware	< 1.0.4.38	cpe:2.3:o:netgear:r7900_firmware::::::::
netgear	r7960p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r7960p_firmware::::::::
netgear	r8000_firmware	< 1.0.4.66	cpe:2.3:o:netgear:r8000_firmware::::::::
netgear	r7900p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	r8000p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r8000p_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	r7000p_firmware	< 1.3.2.126	cpe:2.3:o:netgear:r7000p_firmware::::::::

References for CVE-2021-29080

URL	Tags
https://kb.netgear.com/000063007/Security-Advisory-for-Pre-authentication-Password-Reset-on-Some-Routers-and-WiFi-Systems-PSV-2019-0150	Vendor Advisory

URL

CVE-2021-29080

Exploit prediction scoring system (EPSS) score for CVE-2021-29080

Common vulnerability scoring system (CVSS) metrics for CVE-2021-29080

Weakness enumeration for CVE-2021-29080

Affected software / configurations for CVE-2021-29080

References for CVE-2021-29080