CVE-2026-50083 Overview
CVE-2026-50083 affects the Aqara IAM/SSO Gateway (gw-builder.aqara.com), which ships with a hardcoded OAuth client credential. The flaw maps to CWE-798: Use of Hard-coded Credentials. Attackers can authenticate to the OAuth flow without any prior access because the secret is embedded in distributed components. When chained with CVE-2026-50082, CVE-2026-50084, and CVE-2026-50085, the issue enables unauthenticated remote takeover of affected Aqara devices. The vulnerability is reachable over the network with no privileges or user interaction.
Critical Impact
Hardcoded OAuth credentials in the Aqara IAM/SSO Gateway allow remote attackers to bypass authentication and, when chained with related CVEs, achieve full device takeover.
Affected Products
- Aqara IAM/SSO Gateway (gw-builder.aqara.com)
- Aqara smart home devices relying on the IAM/SSO Gateway for OAuth authentication
- Aqara cloud services issuing tokens via the affected OAuth client
Discovery Timeline
- 2026-06-12 - CVE-2026-50083 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-50083
Vulnerability Analysis
The Aqara IAM/SSO Gateway distributes an OAuth client credential that is hardcoded into client-side or firmware components. Because every deployment shares the same secret, an attacker who extracts it once can impersonate the trusted OAuth client against the central authorization service. The credential grants the bearer the trust normally reserved for legitimate Aqara applications, including the ability to request tokens, initiate authorization flows, and interact with backend APIs as a recognized client.
Researchers documented the issue alongside three related findings (CVE-2026-50082, CVE-2026-50084, CVE-2026-50085). Together the chain removes every authentication boundary between an external attacker and device control endpoints. The RunZero advisory and the public proof-of-concept describe the chained exploitation path.
Root Cause
The root cause is the inclusion of a static OAuth client_id and client_secret pair inside distributable artifacts. OAuth 2.0 treats client secrets as confidential material, but embedding them in firmware or mobile applications makes them recoverable through static analysis. Once extracted, the secret cannot be rotated per-device, so every customer remains exposed until the vendor restructures the authentication design.
Attack Vector
An unauthenticated remote attacker reverse-engineers the Aqara client to obtain the hardcoded OAuth credential. The attacker then issues authenticated requests to the IAM/SSO Gateway as a trusted OAuth client. Combined with the companion CVEs in the chain, this access enables manipulation of user accounts, token issuance, and ultimately remote takeover of paired devices without victim interaction.
No verified exploit code is reproduced here. See the GitHub proof-of-concept repository for the technical chain.
Detection Methods for CVE-2026-50083
Indicators of Compromise
- Unexpected OAuth token requests to Aqara IAM/SSO endpoints originating from non-Aqara IP ranges or unknown user agents.
- Authorization grants issued to devices or accounts that did not initiate a legitimate enrollment flow.
- Spikes in client_credentials or authorization_code exchanges referencing the affected OAuth client identifier.
Detection Strategies
- Monitor egress traffic from smart home gateways to gw-builder.aqara.com for anomalous request volumes or non-standard headers.
- Correlate device command events with the originating OAuth session to identify tokens used outside expected mobile app contexts.
- Alert on repeated token issuance for the same client identifier from disparate geographies within short windows.
Monitoring Recommendations
- Capture and retain authentication logs from the IAM/SSO Gateway with full client identifier, source IP, and grant type fields.
- Forward Aqara-related network telemetry to a centralized analytics platform for behavioral baselining.
- Track configuration changes on Aqara hubs and review any device pairings initiated without local user activity.
How to Mitigate CVE-2026-50083
Immediate Actions Required
- Apply the latest firmware and mobile application updates issued by Aqara as soon as they become available.
- Segment Aqara hubs and IoT devices onto an isolated VLAN with restricted outbound access.
- Audit all paired devices and connected accounts, removing any that cannot be attributed to a known user action.
Patch Information
At the time of publication, no vendor advisory URL is referenced in the NVD entry. Consult the RunZero advisory for ongoing remediation status and any vendor-issued firmware updates addressing the hardcoded OAuth client credential.
Workarounds
- Block outbound connections from Aqara devices to non-essential cloud endpoints at the network perimeter until firmware is updated.
- Disable remote access features on Aqara hubs and rely on local automation where possible.
- Rotate associated user account passwords and revoke active OAuth sessions through the Aqara mobile application.
# Example: restrict Aqara hub egress to vendor endpoints only
iptables -A FORWARD -s 192.168.50.0/24 -p tcp --dport 443 -d gw-builder.aqara.com -j ACCEPT
iptables -A FORWARD -s 192.168.50.0/24 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
