CVE-2026-50213 Overview
CVE-2026-50213 is an information disclosure vulnerability in an account validation API endpoint. The /v1/User/validate endpoint returns comprehensive user profile data sheets in its response. Attackers can crawl the endpoint by iterating predictable identification strings, enabling bulk extraction of user records without authentication. The advisory is published through the Acer Community Knowledge Base. The Common Weakness Enumeration assigned is [CWE-798], which covers hardcoded credentials and related authentication weaknesses tied to predictable identifiers.
Critical Impact
Unauthenticated attackers can enumerate user identifiers and extract complete user profile data from the affected API, producing large-scale exposure of personally identifiable information.
Affected Products
- Acer (per vendor advisory) — specific product and version details are not enumerated in NVD
- Refer to the Acer Community Knowledge Base advisory for product scope
Discovery Timeline
- 2026-06-04 - CVE-2026-50213 published to NVD
- 2026-06-04 - Last updated in NVD database
Technical Details for CVE-2026-50213
Vulnerability Analysis
The vulnerability resides in the /v1/User/validate REST API endpoint. The endpoint is designed to verify account state but returns a full user profile data sheet in the response body. Because the endpoint accepts predictable identification strings as input, an attacker can script sequential requests and harvest every user record reachable through the namespace. The attack vector is network-based and requires no privileges or user interaction. Confidentiality impact is high, while integrity and availability are not affected.
Root Cause
The endpoint conflates account validation with profile retrieval. It returns sensitive profile attributes in responses intended only to confirm whether an account exists. Combined with identifiers that follow a predictable pattern, the design lets unauthenticated callers enumerate the user space. The mapped weakness [CWE-798] reflects the reliance on predictable values as the access boundary rather than enforced authentication or authorization checks.
Attack Vector
An attacker iterates user identifiers against /v1/User/validate over HTTPS. Each successful response yields a profile data sheet that may include account metadata and personally identifiable information. No credentials, tokens, or session state are required. The attack scales linearly with request volume and is constrained only by rate limiting, if present. No public proof-of-concept code is referenced in the NVD entry, and no exploitation in the wild has been reported.
No verified exploit code is available for CVE-2026-50213. See the Acer Community Knowledge Base advisory for vendor-supplied technical details.
Detection Methods for CVE-2026-50213
Indicators of Compromise
- High-volume sequential or pattern-based requests to /v1/User/validate from a single source IP or small set of IPs
- HTTP 200 responses to the endpoint that return non-trivial response body sizes, suggesting profile data was disclosed
- Requests to the endpoint that lack a referring authenticated session or expected client context
Detection Strategies
- Build web application firewall and API gateway rules that flag enumeration patterns against /v1/User/validate, including incremental or dictionary-based identifier sweeps
- Alert on a single client requesting the endpoint more than a defined threshold within a short window
- Correlate access log spikes for the endpoint with downstream egress of structured profile data
Monitoring Recommendations
- Forward API gateway and reverse proxy logs to a centralized analytics platform with retention sufficient for retrospective hunting
- Track per-identifier response size and unique identifier counts per source IP as enumeration signals
- Monitor authentication telemetry for follow-on credential stuffing that may use harvested profile data
How to Mitigate CVE-2026-50213
Immediate Actions Required
- Restrict /v1/User/validate to authenticated callers and enforce per-user authorization on every request
- Apply strict rate limiting and anomaly-based throttling on the endpoint at the API gateway
- Reduce the endpoint response to a minimal boolean or status value rather than returning full profile data
Patch Information
No patch versions are enumerated in the NVD record. Consult the Acer Community Knowledge Base advisory for fixed builds, configuration changes, and remediation guidance from the vendor.
Workarounds
- Replace predictable identification strings with high-entropy, non-sequential identifiers such as UUIDv4
- Place the endpoint behind an authenticated session and require a CSRF or anti-automation token
- Deploy bot management controls to block scripted enumeration against the API path
No verified configuration example is available. Refer to the vendor advisory for product-specific mitigation steps.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
