How severe is CVE-2021-45530?

CVE-2021-45530 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45530 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45530?

CVE-2021-45530 primarily affects Netgear R7000 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45530?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-45530 published?

CVE-2021-45530 was published on 2021-12-26 and last updated on 2026-06-17.

CVE-2021-45530

CVE-2021-45530 is a medium-severity vulnerability in Netgear R7000 Firmware with a CVSS 3.x base score of 4.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 4.5)
CVSS v2: 6.5
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Netgear R7000 Firmware
Published: 2021-12-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-45530?: CVE-2021-45530 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45530 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45530?: CVE-2021-45530 primarily affects Netgear R7000 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45530?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45530 published?: CVE-2021-45530 was published on 2021-12-26 and last updated on 2026-06-17.

References

https://kb.netgear.com/000064486/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2020-0320

Affected products (12)

cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r7960p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r8000p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax20_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax45_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax15_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax75_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rax50_firmware:*:*:*:*:*:*:*:*

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