CVE-2026-22559 | Ubiquiti UniFi Network Server up to 10.1.88 Link input validation

VDB-352856 · CVE-2026-22559 · GCVE-0-2026-22559 UBIQUITI UNIFI NETWORK SERVER UP TO 10.1.88 LINK INPUT VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.6 $0-$5k 1.88 Summaryinfo A vulnerability classified as very critical was found in Ubiquiti UniFi Network Server up to 10.1.88. This impacts an unknown function of the component Link Handler. Such manipulation leads to input validation. This vulnerability is documented as CVE-2026-22559. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability, which was classified as very critical, has been found in Ubiquiti UniFi Network Server up to 10.1.88. Affected by this issue is an unknown function of the component Link Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The 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. Impacted is confidentiality, integrity, and availability. CVE summarizes: An Improper Input Validation vulnerability in UniFi Network Server may allow unauthorized access to an account if the account owner is socially engineered into clicking a malicious link. Affected Products: UniFi Network Server (Version 10.1.85 and earlier) Mitigation: Update UniFi Network Server to Version 10.1.89 or later. The advisory is shared for download at community.ui.com. This vulnerability is handled as CVE-2026-22559 since 01/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/24/2026). Upgrading to version 10.1.89 eliminates this vulnerability. Productinfo Vendor Ubiquiti Name UniFi Network Server Version 10.1.0 10.1.1 10.1.2 10.1.3 10.1.4 10.1.5 10.1.6 10.1.7 10.1.8 10.1.9 10.1.10 10.1.11 10.1.12 10.1.13 10.1.14 10.1.15 10.1.16 10.1.17 10.1.18 10.1.19 10.1.20 10.1.21 10.1.22 10.1.23 10.1.24 10.1.25 10.1.26 10.1.27 10.1.28 10.1.29 10.1.30 10.1.31 10.1.32 10.1.33 10.1.34 10.1.35 10.1.36 10.1.37 10.1.38 10.1.39 10.1.40 10.1.41 10.1.42 10.1.43 10.1.44 10.1.45 10.1.46 10.1.47 10.1.48 10.1.49 10.1.50 10.1.51 10.1.52 10.1.53 10.1.54 10.1.55 10.1.56 10.1.57 10.1.58 10.1.59 10.1.60 10.1.61 10.1.62 10.1.63 10.1.64 10.1.65 10.1.66 10.1.67 10.1.68 10.1.69 10.1.70 10.1.71 10.1.72 10.1.73 10.1.74 10.1.75 10.1.76 10.1.77 10.1.78 10.1.79 10.1.80 10.1.81 10.1.82 10.1.83 10.1.84 10.1.85 10.1.86 10.1.87 10.1.88 License commercial CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.8 VulDB Meta Temp Score: 8.6 VulDB Base Score: 8.8 VulDB Temp Score: 8.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.8 CNA Vector (hackerone): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Input validation CWE: CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: UniFi Network Server 10.1.89 Timelineinfo 01/07/2026 CVE reserved 03/24/2026 +76 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: community.ui.com Status: Confirmed CVE: CVE-2026-22559 (🔒) GCVE (CVE): GCVE-0-2026-22559 GCVE (VulDB): GCVE-100-352856 Entryinfo Created: 03/24/2026 20:56 Changes: 03/24/2026 20:56 (63) Complete: 🔍 Cache ID: 99:A0D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸