How severe is CVE-2021-44530?

CVE-2021-44530 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44530 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44530?

CVE-2021-44530 affects Ui Unifi Network Controller. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44530?

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

When was CVE-2021-44530 published?

CVE-2021-44530 was published on 2022-01-14 and last updated on 2026-06-17.

CVE-2021-44530

CVE-2021-44530 is a critical-severity vulnerability in Ui Unifi Network Controller with a CVSS 3.x base score of 9.8. 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-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Ui Unifi Network Controller
Published: 2022-01-14
Last modified: 2026-06-17

Description

An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a malicious actor to control the application.

Frequently asked questions

What is CVE-2021-44530?: An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a malicious actor to control the application.
How severe is CVE-2021-44530?: CVE-2021-44530 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44530 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44530?: CVE-2021-44530 affects Ui Unifi Network Controller. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44530?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-44530 published?: CVE-2021-44530 was published on 2022-01-14 and last updated on 2026-06-17.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-023-023/808a1db0-5f8e-4b91-9097-9822f3f90207

Affected products (1)

cpe:2.3:a:ui:unifi_network_controller:*:*:*:*:*:*:*:*

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