How severe is CVE-2021-22882?

CVE-2021-22882 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22882 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22882?

CVE-2021-22882 affects Ui Unifi Protect Controller. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22882?

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-2021-22882 published?

CVE-2021-22882 was published on 2021-02-23 and last updated on 2026-06-17.

CVE-2021-22882

CVE-2021-22882 is a high-severity vulnerability in Ui Unifi Protect Controller with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Ui Unifi Protect Controller
Published: 2021-02-23
Last modified: 2026-06-17

Description

UniFi Protect before v1.17.1 allows an attacker to use spoofed cameras to perform a denial-of-service attack that may cause the UniFi Protect controller to crash.

Frequently asked questions

What is CVE-2021-22882?: UniFi Protect before v1.17.1 allows an attacker to use spoofed cameras to perform a denial-of-service attack that may cause the UniFi Protect controller to crash.
How severe is CVE-2021-22882?: CVE-2021-22882 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22882 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22882?: CVE-2021-22882 affects Ui Unifi Protect Controller. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22882?: 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-2021-22882 published?: CVE-2021-22882 was published on 2021-02-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ui:unifi_protect_controller:*:*:*:*:*:*:*:*

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