CVE-2021-38513

Certain NETGEAR devices are affected by authentication bypass. This affects RBK852 before 3.2.10.11, RBR850 before 3.2.10.11, RBS850 before 3.2.10.11, CBR40 before 2.5.0.10, EAX20 before 1.0.0.48, MK62 before 1.0.6.110, MR60 before 1.0.6.110, MS60 before 1.0.6.110, RBK752 before 3.2.10.10, RBR750 before 3.2.10.10, and RBS750 before 3.2.10.10.

Published: 2021-08-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-38513 is rated High Risk (66.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.83%). EPSS rose +1.52% 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-2021-38513

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 0.32% 1.83% +1.52%
2 2025-03-30 0.95% 0.32% -0.63%
3 2025-03-29 — 0.95% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-38513

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.6 3.1 CRITICAL
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/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: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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 6.0 [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-2021-38513

Affected software / configurations for CVE-2021-38513

Vendor Product Version Raw CPE
netgear rbk852_firmware < 3.2.10.11 cpe:2.3:o:netgear:rbk852_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 eax20_firmware < 1.0.0.48 cpe:2.3:o:netgear:eax20_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 rbk752_firmware < 3.2.10.10 cpe:2.3:o:netgear:rbk752_firmware:*:*:*:*:*:*:*:*
netgear rbr750_firmware < 3.2.10.10 cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*
netgear rbs750_firmware < 3.2.10.10 cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-38513

cvelogic Threat Intelligence