How severe is CVE-2021-45518?

CVE-2021-45518 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-2021-45518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45518?

CVE-2021-45518 affects Netgear Xr1000 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45518?

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

When was CVE-2021-45518 published?

CVE-2021-45518 was published on 2021-12-26 and last updated on 2026-06-17.

CVE-2021-45518

CVE-2021-45518 is a medium-severity vulnerability in Netgear Xr1000 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: 6.1
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netgear Xr1000 Firmware
Published: 2021-12-26
Last modified: 2026-06-17

Description

NETGEAR XR1000 devices before 1.0.0.58 are affected by denial of service.

Frequently asked questions

What is CVE-2021-45518?: NETGEAR XR1000 devices before 1.0.0.58 are affected by denial of service.
How severe is CVE-2021-45518?: CVE-2021-45518 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-2021-45518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45518?: CVE-2021-45518 affects Netgear Xr1000 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45518 published?: CVE-2021-45518 was published on 2021-12-26 and last updated on 2026-06-17.

References

https://kb.netgear.com/000064157/Security-Advisory-for-Denial-of-Service-on-XR1000-PSV-2021-0032

Affected products (1)

cpe:2.3:o:netgear:xr1000_firmware:*:*:*:*:*:*:*:*

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