CVE-2021-44530: ui unifi_network_controller Improper Input Validation
CVSS: 9.8v3.1CriticalModified
Published 14-01-2022Last modified 04-08-2024
Vulnerability summary
CVE-2021-44530 is a critical (CVSS 9.8) Improper Input Validation vulnerability in ui unifi_network_controller. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 64.8% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.09%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 14-01-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.09%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
0.00 pp
From 1.09% on 19-09-2026
19-09-202619-10-2026
EPSS score1.09%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
Affected systems
Ui1 product
- unifi_network_controller≤ 6.5.53
1 vendor · 1 product
References
1 links- community.ui.com/releases/Security-Advisory-Bulletin-023-023/808a1db0-5f8e-4b91-9097-9822f3f90207X Refsource MISCPatchVendor Advisory