CVE-2021-45511

Certain NETGEAR devices are affected by authentication bypass. This affects AC2100 before 2021-08-27, AC2400 before 2021-08-27, AC2600 before 2021-08-27, D7000 before 2021-08-27, R6220 before 2021-08-27, R6230 before 2021-08-27, R6260 before 2021-08-27, R6330 before 2021-08-27, R6350 before 2021-08-27, R6700v2 before 2021-08-27, R6800 before 2021-08-27, R6850 before 2021-08-27, R6900v2 before 2021-08-27, R7200 before 2021-08-27, R7350 before 2021-08-27, R7400 before 2021-08-27, and R7450 before 2021-08-27.

Published: 2021-12-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45511 is rated Moderate Risk (59.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 48.00%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. 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-2021-45511

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 2026-02-11 49.50% 48.00% -1.50%
2 2025-11-21 58.11% 49.50% -8.61%
3 2025-11-18 — 58.11% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45511

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:H/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: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: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.
 0.9 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]
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-2021-45511

Affected software / configurations for CVE-2021-45511

Vendor Product Version Raw CPE
netgear ac2100_firmware < 1.2.0.88 cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*
netgear ac2400_firmware < 1.2.0.88 cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*
netgear ac2600_firmware < 1.2.0.88 cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*
netgear d7000_firmware < 1.0.1.80 cpe:2.3:o:netgear:d7000_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 < 1.2.0.88 cpe:2.3:o:netgear:r6700v2_firmware:*:*:*:*:*:*:*:*
netgear r6800_firmware < 1.2.0.88 cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*
netgear r6850_firmware < 1.1.0.84 cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*
netgear r6900v2_firmware < 1.2.0.88 cpe:2.3:o:netgear:r6900v2_firmware:*:*:*:*:*:*:*:*
netgear r7200_firmware < 1.2.0.88 cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*
netgear r7350_firmware < 1.2.0.88 cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*
netgear r7400_firmware < 1.2.0.88 cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*
netgear r7450_firmware < 1.2.0.88 cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45511

cvelogic Threat Intelligence