CVE-2022-27642 [High] | Security Bypass in Cax80 Firmware

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-15854.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.07%	0.87%	+0.80%
2	2026-03-31	0.04%	0.07%	+0.03%
3	2025-11-21	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.07%

0.87%

+0.80%

2026-03-31

0.04%

0.07%

+0.03%

2025-11-21

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:N/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: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.	2.8	5.9	[email protected]
6.3	3.0	MEDIUM	`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L` 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:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	3.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/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: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.

2.8

5.9

[email protected]

6.3

3.0

MEDIUM

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L 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:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

3.4

[email protected]

Affected software / configurations for CVE-2022-27642

Vendor	Product	Version	Raw CPE
netgear	cax80_firmware	< 2.1.3.7	cpe:2.3:o:netgear:cax80_firmware::::::::
netgear	lax20_firmware	< 1.1.6.34	cpe:2.3:o:netgear:lax20_firmware::::::::
netgear	mr60_firmware	< 1.1.6.124	cpe:2.3:o:netgear:mr60_firmware::::::::
netgear	mr80_firmware	< 1.1.6.14	cpe:2.3:o:netgear:mr80_firmware::::::::
netgear	ms60_firmware	< 1.1.6.124	cpe:2.3:o:netgear:ms60_firmware::::::::
netgear	ms80_firmware	< 1.1.6.14	cpe:2.3:o:netgear:ms80_firmware::::::::
netgear	r6400_firmware	< 1.0.1.78	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6400_firmware	< 1.0.4.126	cpe:2.3:o:netgear:r6400_firmware::::::::
netgear	r6700_firmware	< 1.0.4.126	cpe:2.3:o:netgear:r6700_firmware::::::::
netgear	r6900p_firmware	< 1.3.3.148	cpe:2.3:o:netgear:r6900p_firmware::::::::
netgear	r7000_firmware	< 1.0.11.134	cpe:2.3:o:netgear:r7000_firmware::::::::
netgear	r7000p_firmware	< 1.3.3.148	cpe:2.3:o:netgear:r7000p_firmware::::::::
netgear	r7850_firmware	< 1.0.5.84	cpe:2.3:o:netgear:r7850_firmware::::::::
netgear	r7900p_firmware	< 1.4.3.88	cpe:2.3:o:netgear:r7900p_firmware::::::::
netgear	r7960p_firmware	< 1.4.3.88	cpe:2.3:o:netgear:r7960p_firmware::::::::
netgear	r8000_firmware	< 1.0.4.84	cpe:2.3:o:netgear:r8000_firmware::::::::
netgear	r8000p_firmware	< 1.4.3.88	cpe:2.3:o:netgear:r8000p_firmware::::::::
netgear	r8500_firmware	< 1.0.2.158	cpe:2.3:o:netgear:r8500_firmware::::::::
netgear	rax15_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax15_firmware::::::::
netgear	rax20_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax20_firmware::::::::
netgear	rax200_firmware	< 1.0.6.138	cpe:2.3:o:netgear:rax200_firmware::::::::
netgear	rax35_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax35_firmware::::::::
netgear	rax38_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax38_firmware::::::::
netgear	rax40_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax40_firmware::::::::
netgear	rax42_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax42_firmware::::::::
netgear	rax43_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax43_firmware::::::::
netgear	rax45_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax45_firmware::::::::
netgear	rax48_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax48_firmware::::::::
netgear	rax50_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax50_firmware::::::::
netgear	rax50s_firmware	< 1.0.10.110	cpe:2.3:o:netgear:rax50s_firmware::::::::
netgear	rax75_firmware	< 1.0.6.138	cpe:2.3:o:netgear:rax75_firmware::::::::
netgear	rax80_firmware	< 1.0.6.138	cpe:2.3:o:netgear:rax80_firmware::::::::
netgear	rs400_firmware	< 1.5.1.86	cpe:2.3:o:netgear:rs400_firmware::::::::
netgear	r7100lg_firmware	< 1.0.0.76	cpe:2.3:o:netgear:r7100lg_firmware::::::::

References for CVE-2022-27642

URL	Tags
https://kb.netgear.com/000064723/Security-Advisory-for-Multiple-Vulnerabilities-on-Multiple-Products-PSV-2021-0327	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-22-518/	Third Party Advisory VDB Entry

URL

CVE-2022-27642

Exploit prediction scoring system (EPSS) score for CVE-2022-27642

Common vulnerability scoring system (CVSS) metrics for CVE-2022-27642

Weakness enumeration for CVE-2022-27642

Affected software / configurations for CVE-2022-27642

References for CVE-2022-27642