CVE-2021-45528

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects R6300v2 before 1.0.4.52, R6400 before 1.0.1.52, R6900 before 1.0.2.8, R7000 before 1.0.9.88, R7900 before 1.0.3.18, R8000 before 1.0.4.46, R7900P before 1.4.1.50, R8000P before 1.4.1.50, RAX75 before 1.0.3.88, RAX80 before 1.0.3.88, and WNR3500Lv2 before 1.2.0.62.

Published: 2021-12-26 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45528 is rated Moderate Risk (47.3/100): CVSS High severity, with low exploitation likelihood (EPSS 0.55%). 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-2021-45528

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 0.17% 0.55% +0.38%
2 2025-03-30 0.28% 0.17% -0.10%
3 2025-03-29 — 0.28% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45528

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
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.
 1.5 6.0 [email protected]
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/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: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.
 1.2 5.9 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/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:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2021-45528

Affected software / configurations for CVE-2021-45528

Vendor Product Version Raw CPE
netgear r6300v2_firmware <= 1.0.4.52 cpe:2.3:o:netgear:r6300v2_firmware:*:*:*:*:*:*:*:*
netgear r6400_firmware < 1.0.1.52 cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
netgear r6900_firmware < 1.0.2.8 cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
netgear r7000_firmware < 1.0.9.88 cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
netgear r7900_firmware < 1.0.3.18 cpe:2.3:o:netgear:r7900_firmware:*:*:*:*:*:*:*:*
netgear r7900p_firmware < 1.4.1.50 cpe:2.3:o:netgear:r7900p_firmware:*:*:*:*:*:*:*:*
netgear r8000_firmware < 1.0.4.46 cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*
netgear r8000p_firmware < 1.4.1.50 cpe:2.3:o:netgear:r8000p_firmware:*:*:*:*:*:*:*:*
netgear rax75_firmware < 1.0.3.88 cpe:2.3:o:netgear:rax75_firmware:*:*:*:*:*:*:*:*
netgear rax80_firmware < 1.0.3.88 cpe:2.3:o:netgear:rax80_firmware:*:*:*:*:*:*:*:*
netgear wnr3500lv2_firmware < 1.2.0.62 cpe:2.3:o:netgear:wnr3500lv2_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45528

cvelogic Threat Intelligence