How severe is CVE-2021-45533?

CVE-2021-45533 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-45533 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45533?

CVE-2021-45533 primarily affects Netgear Ex6120 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45533?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45533 published?

CVE-2021-45533 was published on 2021-12-26 and last updated on 2026-06-17.

CVE-2021-45533

CVE-2021-45533 is a high-severity vulnerability in Netgear Ex6120 Firmware with a CVSS 3.x base score of 8.4. 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-77.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v2: 5.2
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Netgear Ex6120 Firmware
Published: 2021-12-26
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects EX6120 before 1.0.0.66, EX6130 before 1.0.0.46, EX7000 before 1.0.1.106, EX7500 before 1.0.1.76, EX3700 before 1.0.0.94, EX3800 before 1.0.0.94, RBR850 before 4.6.3.9, RBS850 before 4.6.3.9, and RBK852 before 4.6.3.9.

Frequently asked questions

What is CVE-2021-45533?: Certain NETGEAR devices are affected by command injection by an authenticated user. This affects EX6120 before 1.0.0.66, EX6130 before 1.0.0.46, EX7000 before 1.0.1.106, EX7500 before 1.0.1.76, EX3700 before 1.0.0.94, EX3800 before 1.0.0.94, RBR850 before 4.6.3.9, RBS850 before 4.6.3.9, and RBK852 before 4.6.3.9.
How severe is CVE-2021-45533?: CVE-2021-45533 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-45533 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45533?: CVE-2021-45533 primarily affects Netgear Ex6120 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45533?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45533 published?: CVE-2021-45533 was published on 2021-12-26 and last updated on 2026-06-17.

References

https://kb.netgear.com/000064458/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0062

Affected products (9)

cpe:2.3:o:netgear:ex6120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ex6130_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ex7000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ex7500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ex3700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ex3800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbr850_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbs850_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Netgear Ex6120 Firmware

CVE-2021-32122 — Critical (CVSS 9.8): Certain NETGEAR devices are affected by CSRF. This affects EX3700 before 1.0.0.90, EX3800 before 1.0.0.90, EX6120…
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