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CVE-2026-81531

Unauthenticated Account Information Disclosure in Multiple Omada Controllers

MEDIUM
6.9
CVSS Score
Published: September 8, 2026 at 04:53 PM UTC
Updated: September 21, 2026 at 06:17 PM UTC
5 products affected across 2 vendorsOmada OC400Omada OC300Omada OC220

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Omada OC200· TP-Link
60%
v < (UN)_V1_1.42.10 Build 20260825v < (UN)_V2_2.27.10 Build 20260825v < (UN)_V3_3.4.10 Build 20260825
Affected range stops below (UN)_V1_1.42.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Affected range stops below (UN)_V2_2.27.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Affected range stops below (UN)_V3_3.4.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Omada OC220· TP-Link
60%
v < (UN)_V1_1.7.10 Build 20260825v < (UN)_V2_2.6.10 Build 20260825
Affected range stops below (UN)_V1_1.7.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Affected range stops below (UN)_V2_2.6.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Omada OC300· TP-Link
60%
v < (UN)_V1_1.36.10 Build 20260825
Affected range stops below (UN)_V1_1.36.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Omada OC400· TP-Link
60%
v < (UN)_V1_1.14.10 Build 20260825
Affected range stops below (UN)_V1_1.14.10 Build 20260825, so it looks safe — our inference, not a vendor statement
Omada Software Controller· Tp Link System
60%
v < 6.3.0.45
Affected range stops below 6.3.0.45, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Patch
Source: cverecord
https://support.omadanetworks.com/us/download/software/omada-controller/
Vendor Advisory
Source: cverecord
https://support.omadanetworks.com/us/document/133567/
Patch
Source: cverecord
https://support.omadanetworks.com/en/download/software/omada-controller/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.9MEDIUMTPLink
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-200

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