CVE-2021-45501

Certain NETGEAR devices are affected by authentication bypass. This affects AC2400 before 1.1.0.84, AC2600 before 1.1.0.84, D7000 before 1.0.1.82, R6020 before 1.0.0.52, R6080 before 1.0.0.52, R6120 before 1.0.0.80, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84, R6330 before 1.1.0.84, R6350 before 1.1.0.84, R6700v2 before 1.1.0.84, R6800 before 1.1.0.84, R6850 before 1.1.0.84, R6900v2 before 1.1.0.84, R7200 before 1.1.0.84, R7350 before 1.1.0.84, R7400 before 1.1.0.84, and R7450 before 1.1.0.84.

Published: 2021-12-25 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45501 is rated High Risk (66.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.87%). EPSS rose +1.72% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-45501

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 1.87% +1.72%
2 2025-12-16 0.30% 0.15% -0.15%
3 2025-11-21 — 0.30% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45501

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.4 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 5.5 [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]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2021-45501

Affected software / configurations for CVE-2021-45501

Vendor Product Version Raw CPE
netgear ac2400_firmware < 1.1.0.84 cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*
netgear ac2600_firmware < 1.1.0.84 cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*
netgear d7000_firmware < 1.0.1.82 cpe:2.3:o:netgear:d7000_firmware:*:*:*:*:*:*:*:*
netgear r6020_firmware < 1.0.0.52 cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*
netgear r6080_firmware < 1.0.0.52 cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*
netgear r6120_firmware < 1.0.0.80 cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:*
netgear r6220_firmware < 1.1.0.110 cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
netgear r6230_firmware < 1.1.0.110 cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*
netgear r6260_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*
netgear r6330_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*
netgear r6350_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*
netgear r6700v2_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6700v2_firmware:*:*:*:*:*:*:*:*
netgear r6800_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*
netgear r6850_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*
netgear r6900v2_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6900v2_firmware:*:*:*:*:*:*:*:*
netgear r7200_firmware < 1.1.0.84 cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*
netgear r7350_firmware < 1.1.0.84 cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*
netgear r7400_firmware < 1.1.0.84 cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*
netgear r7450_firmware < 1.1.0.84 cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45501

cvelogic Threat Intelligence