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CVE-2026-81531— Unauthenticated Account Information Disclosure in Multiple Omada Controllers

Quick assessment

Affected
TP-Link System Inc. Omada Software Controller
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link Omada Software Controller是中国TP-Link公司的一款集中管理无线接入点、交换机和网关等网络设备的软件控制器。 TP-Link Omada Software Controller存在信息泄露漏洞，该漏洞源于用于控制器初始化的API端点在初始化完成后仍可访问，可能向未经验证的远程用户泄露账户相关信息，导致用户枚举和针对管理员账户的后续攻击。

CVSS 6.9 · Medium EPSS 0.38% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProduct Version RangeStatus
TP Link Systems Inc. OC200 v2 < (UN)_V2_2.27.10 Build 20260825 affected
TP-Link System Inc. Omada Software Controller < 6.3.0.44 affected
TP-Link Systems Inc OC200 v3 < (UN)_V3_3.4.10 Build 20260825 affected
TP-Link Systems Inc OC220 v2 < (UN)_V2_2.6.10 Build 20260825 affected
TP-Link Systems Inc. OC200 V1 < (UN)_V1_1.42.10 Build 20260825 affected
TP-Link Systems Inc. OC220 v1 < (UN)_V1_1.7.10 Build 20260825 affected
TP-Link Systems Inc. OC300 v1 < (UN)_V1_1.36.10 Build 20260825 affected
TP-Link Systems Inc. OC400 v1 < (UN)_V1_1.14.10 Build 20260825 affected
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I. Basic Information for CVE-2026-81531

Vulnerability Information
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Vulnerability Title
Unauthenticated Account Information Disclosure in Multiple Omada Controllers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Omada Software Controller 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link Omada Software Controller是中国TP-Link公司的一款集中管理无线接入点、交换机和网关等网络设备的软件控制器。 TP-Link Omada Software Controller存在信息泄露漏洞，该漏洞源于用于控制器初始化的API端点在初始化完成后仍可访问，可能向未经验证的远程用户泄露账户相关信息，导致用户枚举和针对管理员账户的后续攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link System Inc. Omada Software Controller 0 ~ 6.3.0.44 -
TP-Link Systems Inc. OC200 V1 0 ~ (UN)_V1_1.42.10 Build 20260825 -
TP Link Systems Inc. OC200 v2 0 ~ (UN)_V2_2.27.10 Build 20260825 -
TP-Link Systems Inc OC200 v3 0 ~ (UN)_V3_3.4.10 Build 20260825 -
TP-Link Systems Inc. OC220 v1 0 ~ (UN)_V1_1.7.10 Build 20260825 -
TP-Link Systems Inc OC220 v2 0 ~ (UN)_V2_2.6.10 Build 20260825 -
TP-Link Systems Inc. OC300 v1 0 ~ (UN)_V1_1.36.10 Build 20260825 -
TP-Link Systems Inc. OC400 v1 0 ~ (UN)_V1_1.14.10 Build 20260825 -

II. Public POCs for CVE-2026-81531

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III. Intelligence Information for CVE-2026-81531

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Vendor Advisories for CVE-2026-81531 (1)

Vendor Pages for CVE-2026-81531 (1)

IV. Related Vulnerabilities

Same product: Omada Software Controller
Same vendor: TP-Link System Inc.
Same weakness: CWE-200

V. Comments for CVE-2026-81531

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