How severe is CVE-2021-22943?

CVE-2021-22943 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22943 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22943?

CVE-2021-22943 affects Ui Unifi Protect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22943?

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-2021-22943 published?

CVE-2021-22943 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-22943

CVE-2021-22943 is a critical-severity vulnerability in Ui Unifi Protect with a CVSS 3.x base score of 9.6. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 8.3
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Ui Unifi Protect
Published: 2021-08-31
Last modified: 2026-06-17

Description

A vulnerability found in UniFi Protect application V1.18.1 and earlier permits a malicious actor who has already gained access to a network to subsequently control the Protect camera(s) assigned to said network. This vulnerability is fixed in UniFi Protect application V1.19.0 and later.

Frequently asked questions

What is CVE-2021-22943?: A vulnerability found in UniFi Protect application V1.18.1 and earlier permits a malicious actor who has already gained access to a network to subsequently control the Protect camera(s) assigned to said network. This vulnerability is fixed in UniFi Protect application V1.19.0 and later.
How severe is CVE-2021-22943?: CVE-2021-22943 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22943 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22943?: CVE-2021-22943 affects Ui Unifi Protect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22943?: 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-2021-22943 published?: CVE-2021-22943 was published on 2021-08-31 and last updated on 2026-06-17.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-019-019/90a00abe-d6b6-43c6-92d4-0a0342f1506f

Affected products (1)

cpe:2.3:a:ui:unifi_protect:*:*:*:*:*:*:*:*

More vulnerabilities in Ui Unifi Protect

CVE-2026-55115 — Critical (CVSS 9.9): A malicious actor with access to the network and low privileges could exploit a Server-Side Request Forgery (SSRF) in…
CVE-2026-56841 — High (CVSS 8.8): A malicious actor with access to the network and low privileges could exploit an authenticated SQL Injection…
CVE-2026-21633 — High (CVSS 8.8): A malicious actor with access to the adjacent network could obtain unauthorized access to a UniFi Protect Camera by…
CVE-2021-22957 — High (CVSS 8.8): A Cross-Origin Resource Sharing (CORS) vulnerability found in UniFi Protect application Version 1.19.2 and earlier…
CVE-2026-54408 — High (CVSS 8.6): A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi…
CVE-2026-54407 — High (CVSS 8.6): A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi…

All CVEs affecting Ui Unifi Protect →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →