What’s Vulnerable › Vulnerabilities
CVE-2026-81531: Unauthenticated Account Information Disclosure in Multiple Omada Controllers
- Severity: medium (CVSS 6.9 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-08 · updated 2026-09-21
- Weakness: CWE-200
Description
An information disclosure vulnerability has been identified in Omada Controller. An API endpoint intended for Controller initialization remains accessible after completion and may disclose account-related information to unauthenticated remote users. Successful exploitation may allow an attacker to remote query the affected endpoint that may facilitate user enumeration and subsequent attacks targeting administrative accounts.
Affected products
- TP-Link Systems Inc. OC200 V1: before (UN)_V1_1.42.10 Build 20260825 — fixed in (UN)_V1_1.42.10 Build 20260825
- TP-Link Systems Inc. OC220 v1: before (UN)_V1_1.7.10 Build 20260825 — fixed in (UN)_V1_1.7.10 Build 20260825
- TP-Link Systems Inc. OC300 v1: before (UN)_V1_1.36.10 Build 20260825 — fixed in (UN)_V1_1.36.10 Build 20260825
- TP-Link Systems Inc. OC400 v1: before (UN)_V1_1.14.10 Build 20260825 — fixed in (UN)_V1_1.14.10 Build 20260825
- TP-Link System Inc. Omada Software Controller: before 6.3.0.45 — fixed in 6.3.0.45
- TP-Link Systems Inc OC200 v3: before (UN)_V3_3.4.10 Build 20260825 — fixed in (UN)_V3_3.4.10 Build 20260825
- TP-Link Systems Inc OC220 v2: before (UN)_V2_2.6.10 Build 20260825 — fixed in (UN)_V2_2.6.10 Build 20260825
- TP Link Systems Inc. OC200 v2: before (UN)_V2_2.27.10 Build 20260825 — fixed in (UN)_V2_2.27.10 Build 20260825
How to fix
Upgrade to a fixed version: TP-Link Systems Inc. OC200 V1 (UN)_V1_1.42.10 Build 20260825; TP-Link Systems Inc. OC220 v1 (UN)_V1_1.7.10 Build 20260825; TP-Link Systems Inc. OC300 v1 (UN)_V1_1.36.10 Build 20260825; TP-Link Systems Inc. OC400 v1 (UN)_V1_1.14.10 Build 20260825; TP-Link System Inc. Omada Software Controller 6.3.0.45; TP-Link Systems Inc OC200 v3 (UN)_V3_3.4.10 Build 20260825; TP-Link Systems Inc OC220 v2 (UN)_V2_2.6.10 Build 20260825; TP Link Systems Inc. OC200 v2 (UN)_V2_2.27.10 Build 20260825. Check the vendor advisory for mitigations.
References
- https://support.omadanetworks.com/en/download/software/omada-controller/
- https://support.omadanetworks.com/us/document/133567/
- https://support.omadanetworks.com/us/download/software/omada-controller/
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