CVE-2026-49192: IDOR Authentication Bypass Vulnerability

CVE-2026-49192 is an IDOR authentication bypass flaw affecting a summary service endpoint that fails to verify user ownership of hardware serial numbers, allowing unauthorized access to device data. This article covers technical details, impact assessment, affected systems, and mitigation strategies.

CVE-2026-49192 Overview

CVE-2026-49192 is an Insecure Direct Object Reference (IDOR) vulnerability [CWE-639] affecting a summary service endpoint documented in an Acer Community knowledge base article. The endpoint fails to verify that the authenticated user owns the hardware serial number supplied in the request. An attacker with valid low-privilege credentials can iterate or guess serial numbers to retrieve device data belonging to other users. The flaw enables systematic scraping of device records tied to arbitrary serial numbers across the affected service.

Critical Impact
Authenticated attackers can enumerate hardware serial numbers to harvest device metadata belonging to other users, enabling targeted reconnaissance and bulk data scraping.

Affected Products

Acer summary service endpoint as described in the vendor knowledge base article
Specific product names and versions are not enumerated in the NVD record
Refer to the Acer Community Article for vendor-supplied details

Discovery Timeline

2026-06-04 - CVE-2026-49192 published to NVD
2026-06-04 - Last updated in NVD database

Technical Details for CVE-2026-49192

Vulnerability Analysis

The summary service endpoint accepts a hardware serial number as a request parameter and returns device data associated with that serial number. The endpoint authenticates the requesting user but does not authorize the requested resource. Because the endpoint omits an ownership check between the session principal and the supplied serial number, any authenticated caller can query records that belong to other users.

The attack vector is network-based and requires low privileges with no user interaction. Confidentiality of device records is the primary impact. Integrity and availability impacts are limited because the endpoint exposes data rather than modifying it.

Root Cause

The root cause is missing object-level authorization, classified under [CWE-639] (Authorization Bypass Through User-Controlled Key). The application trusts a client-supplied identifier — the hardware serial number — without binding the lookup to the authenticated user's account context. This is a canonical IDOR pattern in REST and RPC services that key on enumerable identifiers.

Attack Vector

An attacker authenticates with any valid account, then issues repeated requests to the summary endpoint while iterating serial numbers. Serial numbers often follow predictable manufacturer patterns, making enumeration cost-effective. The attacker captures returned device data and aggregates it for downstream use such as warranty fraud, targeted phishing, or supply-chain reconnaissance.

No public proof-of-concept code is referenced in the NVD entry. See the Acer Community Article for vendor remediation guidance.

Detection Methods for CVE-2026-49192

Indicators of Compromise

High-volume requests to the summary service endpoint from a single authenticated session or IP address
Sequential or pattern-based variation of serial number parameters across consecutive requests
Responses returning device data for serial numbers not previously associated with the requesting account

Detection Strategies

Correlate authenticated session identifiers with the serial numbers queried and alert when the cardinality exceeds a normal user baseline
Implement server-side audit logging that records (user_id, serial_number, decision) tuples for every summary lookup
Hunt for distributed scraping by grouping requests by client fingerprint and serial-number entropy

Monitoring Recommendations

Forward web access logs and application audit logs to a centralized analytics platform for retention and search
Build dashboards that track per-user request rates against the summary endpoint with thresholds for anomaly review
Enable alerting on HTTP 200 responses where the returned serial number does not match any serial registered to the authenticated account

How to Mitigate CVE-2026-49192

Immediate Actions Required

Apply vendor guidance published in the Acer Community Article
Add server-side authorization checks that validate ownership of the requested serial number against the authenticated principal before returning data
Rate-limit the summary endpoint per session and per source IP to slow enumeration attempts

Patch Information

The NVD record does not enumerate fixed versions or patch identifiers. Consult the vendor knowledge base article linked in the references for current remediation status and any service-side fixes deployed by the vendor.

Workarounds

Restrict access to the summary endpoint via network controls until ownership validation is enforced
Replace enumerable serial-number identifiers with unguessable per-user tokens or opaque references in API responses
Require an additional ownership proof such as a registration token when querying device data

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# Configuration example
# Refer to vendor documentation for authoritative remediation steps