CVE-2025-15544 Overview
CVE-2025-15544 is a cryptographic weakness affecting the Omada device adoption process used by TP-Link Omada networking equipment. During adoption, authentication credentials associated with site management are transmitted using a weak hashing algorithm. The algorithm does not provide sufficient protection against offline recovery attacks.
An attacker positioned on an adjacent network who intercepts adoption-related authentication traffic can recover valid credentials. Recovered credentials permit unauthorized access to managed devices and controller-managed environments. The weakness is classified under [CWE-759: Use of a One-Way Hash without a Salt].
Critical Impact
Interception of Omada adoption traffic can yield valid site-management credentials, enabling unauthorized control over network devices and the Omada controller environment.
Affected Products
- TP-Link Omada controller software (see vendor advisory for affected versions)
- Omada-managed access points, switches, and gateways during adoption
- Omada Software Controller and Hardware Controller deployments
Discovery Timeline
- 2026-08-03 - CVE-2025-15544 published to NVD
- 2026-08-06 - Last updated in NVD database
Technical Details for CVE-2025-15544
Vulnerability Analysis
The vulnerability resides in the adoption handshake between an Omada controller and unadopted devices such as access points, switches, and gateways. During this handshake, authentication material tied to site management is transmitted after being processed with a weak hash function. The hash provides insufficient preimage resistance for the credential values it protects.
An adjacent-network attacker who observes the adoption exchange can capture the hashed credential material. Offline computation against the captured hash recovers the original credential without triggering controller-side alerts. Once recovered, credentials grant access equivalent to a legitimate site administrator.
Root Cause
The root cause is the selection of a cryptographically weak hashing algorithm for protecting credentials in transit ([CWE-759]). The algorithm lacks proper salting or a modern password-hashing construction such as PBKDF2, bcrypt, scrypt, or Argon2. This design choice allows precomputation and brute-force recovery within practical time frames.
Attack Vector
Exploitation requires an adjacent-network position, such as the same Layer 2 broadcast domain used for controller discovery and adoption. The attacker passively captures adoption traffic while a legitimate adoption event occurs, or induces re-adoption of a target device. The captured hash is then cracked offline using standard password-recovery tooling. Recovered credentials are replayed against the controller or managed devices to gain unauthorized administrative access.
No public proof-of-concept or exploit code has been released for CVE-2025-15544 at the time of publication. See the TP-Link Security FAQ for vendor guidance.
Detection Methods for CVE-2025-15544
Indicators of Compromise
- Unexpected re-adoption events for Omada-managed devices, particularly outside of change windows.
- Logins to the Omada controller from unfamiliar source addresses within the management subnet.
- Configuration changes on managed switches, gateways, or access points that do not correlate with authorized administrator activity.
Detection Strategies
- Monitor management VLANs for unauthorized hosts responding to or initiating Omada discovery and adoption traffic.
- Alert on repeated adoption failures followed by a successful adoption from a new source.
- Correlate controller audit logs with network flow data to identify sessions originating outside expected administrator subnets.
Monitoring Recommendations
- Enable and centralize Omada controller audit logging, including adoption, login, and configuration-change events.
- Baseline normal adoption cadence per site and alert on deviations.
- Inspect ARP and management-plane traffic for rogue devices claiming controller or device roles.
How to Mitigate CVE-2025-15544
Immediate Actions Required
- Apply the latest Omada controller and device firmware from Omada Networks Download Support once vendor patches addressing CVE-2025-15544 are installed.
- Rotate all site-management credentials on Omada controllers after patching.
- Restrict Omada adoption and management traffic to a dedicated, isolated management VLAN.
Patch Information
TP-Link publishes fixed firmware and controller builds through the Omada support portal. Administrators should consult the Omada Networks Download Support page and the TP-Link Security FAQ for the specific versions that address the weak hashing implementation in the adoption process.
Workarounds
- Segment controller and device management traffic onto a VLAN with no untrusted hosts to reduce adjacent-network exposure.
- Schedule device adoption events during controlled maintenance windows with active monitoring of the management segment.
- Enforce strong, unique site-management passwords to raise the offline cracking cost even if hashes are intercepted.
- Disable or limit remote adoption features that expose adoption traffic beyond trusted network segments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
