How severe is CVE-2021-45515?

CVE-2021-45515 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45515 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45515?

CVE-2021-45515 primarily affects Netgear Ex7500 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-2021-45515?

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

When was CVE-2021-45515 published?

CVE-2021-45515 was published on 2021-12-26 and last updated on 2026-06-17.

CVE-2021-45515

CVE-2021-45515 is a medium-severity vulnerability in Netgear Ex7500 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netgear Ex7500 Firmware
Published: 2021-12-26
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by denial of service. This affects EX7500 before 1.0.0.72, RBS40V before 2.6.1.4, RBW30 before 2.6.1.4, RBRE960 before 6.0.3.68, RBSE960 before 6.0.3.68, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, and RBK852 before 3.2.17.12.

Frequently asked questions

What is CVE-2021-45515?: Certain NETGEAR devices are affected by denial of service. This affects EX7500 before 1.0.0.72, RBS40V before 2.6.1.4, RBW30 before 2.6.1.4, RBRE960 before 6.0.3.68, RBSE960 before 6.0.3.68, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, and RBK852 before 3.2.17.12.
How severe is CVE-2021-45515?: CVE-2021-45515 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45515 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45515?: CVE-2021-45515 primarily affects Netgear Ex7500 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-2021-45515?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45515 published?: CVE-2021-45515 was published on 2021-12-26 and last updated on 2026-06-17.

References

https://kb.netgear.com/000064484/Security-Advisory-for-Denial-of-Service-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0286

Affected products (12)

cpe:2.3:o:netgear:ex7500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbs40v_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbw30_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbke963_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbre960_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbse960_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbr850_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbs850_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbk752_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*

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