CVE-2021-45530

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects R7000 before 1.0.11.126, R7960P before 1.4.2.84, R8000 before 1.0.4.74, RAX200 before 1.0.4.120, R8000P before 1.4.2.84, RAX20 before 1.0.2.82, RAX45 before 1.0.2.82, RAX80 before 1.0.4.120, R7900P before 1.4.2.84, RAX15 before 1.0.2.82, RAX50 before 1.0.2.82, and RAX75 before 1.0.4.120.

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-2021-45530 is rated Low Risk (37.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.87%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2021-45530

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 0.55% 0.87% +0.32%
2 2025-03-30 1.16% 0.55% -0.61%
3 2025-03-29 — 1.16% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45530

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.5 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 3.6 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/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:L)
A normal user session is enough; they don’t have to be admin.
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.
 2.8 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-2021-45530

Affected software / configurations for CVE-2021-45530

Vendor Product Version Raw CPE
netgear r7000_firmware < 1.0.11.126 cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
netgear r7000p_firmware < 1.4.2.84 cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:*
netgear r7960p_firmware < 1.4.2.84 cpe:2.3:o:netgear:r7960p_firmware:*:*:*:*:*:*:*:*
netgear r8000_firmware < 1.0.4.74 cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*
netgear r8000p_firmware < 1.4.2.84 cpe:2.3:o:netgear:r8000p_firmware:*:*:*:*:*:*:*:*
netgear rax20_firmware < 1.0.2.82 cpe:2.3:o:netgear:rax20_firmware:*:*:*:*:*:*:*:*
netgear rax200_firmware < 1.0.4.120 cpe:2.3:o:netgear:rax200_firmware:*:*:*:*:*:*:*:*
netgear rax45_firmware < 1.0.2.82 cpe:2.3:o:netgear:rax45_firmware:*:*:*:*:*:*:*:*
netgear rax15_firmware < 1.0.2.82 cpe:2.3:o:netgear:rax15_firmware:*:*:*:*:*:*:*:*
netgear rax75_firmware < 1.0.4.120 cpe:2.3:o:netgear:rax75_firmware:*:*:*:*:*:*:*:*
netgear rax80_firmware < 1.0.4.120 cpe:2.3:o:netgear:rax80_firmware:*:*:*:*:*:*:*:*
netgear rax50_firmware < 1.0.2.82 cpe:2.3:o:netgear:rax50_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45530

cvelogic Threat Intelligence