CVE-2021-29073 [High] | Out-of-bounds Write in R8000p Firmware

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects R8000P before 1.4.1.66, MK62 before 1.0.6.110, MR60 before 1.0.6.110, MS60 before 1.0.6.110, R7960P before 1.4.1.66, R7900P before 1.4.1.66, RAX15 before 1.0.2.82, RAX20 before 1.0.2.82, RAX45 before 1.0.2.72, RAX50 before 1.0.2.72, RAX75 before 1.0.3.106, RAX80 before 1.0.3.106, and RAX200 before 1.0.3.106.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.10%	0.34%	+0.25%
2	2025-03-30	0.24%	0.10%	-0.14%
3	2025-03-29	—	0.24%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.10%

0.34%

+0.25%

2025-03-30

0.24%

0.10%

-0.14%

2025-03-29

—

0.24%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.6	3.1	HIGH	`CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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.	1.0	6.0	[email protected]
8.4	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/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:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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.	1.7	6.0	[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

7.6

3.1

HIGH

CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.

1.0

6.0

[email protected]

8.4

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/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:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.

1.7

6.0

[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-2021-29073

Vendor	Product	Version	Raw CPE
netgear	r8000p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r8000p_firmware::::::::
netgear	mk62_firmware	< 1.0.6.110	cpe:2.3:o:netgear:mk62_firmware::::::::
netgear	mr60_firmware	< 1.0.6.110	cpe:2.3:o:netgear:mr60_firmware::::::::
netgear	ms60_firmware	< 1.0.6.110	cpe:2.3:o:netgear:ms60_firmware::::::::
netgear	r7960p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r7960p_firmware::::::::
netgear	r7900p_firmware	< 1.4.1.66	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	rax15_firmware	< 1.0.2.82	cpe:2.3:o:netgear:rax15_firmware::::::::
netgear	rax20_firmware	< 1.0.2.82	cpe:2.3:o:netgear:rax20_firmware::::::::
netgear	rax45_firmware	< 1.0.2.72	cpe:2.3:o:netgear:rax45_firmware::::::::
netgear	rax50_firmware	< 1.0.2.72	cpe:2.3:o:netgear:rax50_firmware::::::::
netgear	rax75_firmware	< 1.0.3.106	cpe:2.3:o:netgear:rax75_firmware::::::::
netgear	rax80_firmware	< 1.0.3.106	cpe:2.3:o:netgear:rax80_firmware::::::::
netgear	rax200_firmware	< 1.0.3.106	cpe:2.3:o:netgear:rax200_firmware::::::::

References for CVE-2021-29073

URL	Tags
https://kb.netgear.com/000063013/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-WiFi-Systems-PSV-2020-0212	Vendor Advisory

URL

CVE-2021-29073

Exploit prediction scoring system (EPSS) score for CVE-2021-29073

Common vulnerability scoring system (CVSS) metrics for CVE-2021-29073

Weakness enumeration for CVE-2021-29073

Affected software / configurations for CVE-2021-29073

References for CVE-2021-29073