CVE-2021-45609

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D8500 before 1.0.3.58, R6250 before 1.0.4.48, R7000 before 1.0.11.116, R7100LG before 1.0.0.64, R7900 before 1.0.4.38, R8300 before 1.0.2.144, R8500 before 1.0.2.144, XR300 before 1.0.3.68, R7000P before 1.3.2.132, and R6900P before 1.3.2.132.

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-2021-45609 is rated Moderate Risk (61.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.20%). Review affected assets and schedule 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-2021-45609

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 0.34% 1.20% +0.86%
2 2025-03-30 0.71% 0.34% -0.37%
3 2025-03-29 — 0.71% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45609

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: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: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.
 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]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-45609

Affected software / configurations for CVE-2021-45609

Vendor Product Version Raw CPE
netgear d8500_firmware < 1.0.3.58 cpe:2.3:o:netgear:d8500_firmware:*:*:*:*:*:*:*:*
netgear r6250_firmware < 1.0.4.48 cpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*
netgear r7000_firmware < 1.0.11.116 cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
netgear r7000p_firmware < 1.3.2.132 cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:*
netgear r6900p_firmware < 1.3.2.132 cpe:2.3:o:netgear:r6900p_firmware:*:*:*:*:*:*:*:*
netgear r7900_firmware < 1.0.4.38 cpe:2.3:o:netgear:r7900_firmware:*:*:*:*:*:*:*:*
netgear r8300_firmware < 1.0.2.144 cpe:2.3:o:netgear:r8300_firmware:*:*:*:*:*:*:*:*
netgear r8500_firmware < 1.0.2.144 cpe:2.3:o:netgear:r8500_firmware:*:*:*:*:*:*:*:*
netgear r7100lg_firmware < 1.0.0.64 cpe:2.3:o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:*
netgear xr300_firmware < 1.0.3.68 cpe:2.3:o:netgear:xr300_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45609

cvelogic Threat Intelligence