CVE-2026-49192: Acer Connect M6E 5G IDOR Vulnerability – Authorization Bypass & Data Exposure

Technical summary

CVE-2026-49192 is an Insecure Direct Object Reference (IDOR) vulnerability affecting the summary service endpoint in Acer Connect M6E 5G firmware. The endpoint fails to validate that the requesting user owns the hardware serial number being queried. This authorization bypass allows any authenticated attacker to retrieve device data associated with arbitrary serial numbers. The vulnerability is triggered through standard API calls without requiring elevated privileges or user interaction, making it readily exploitable by any account holder.

Business impact

Device owners face privacy erosion as attackers can harvest IoT device data at scale, potentially mapping network deployments, identifying specific hardware configurations, or correlating device details with other reconnaissance data. For organizations managing fleets of M6E 5G devices, this exposure could enable targeting of specific infrastructure or reveal device inventory across customer bases. While not enabling remote code execution, the data exposure supports reconnaissance-driven attacks and violates user privacy expectations.

Affected systems

Acer Connect M6E 5G and its associated firmware are affected. Both the hardware device and its firmware release require attention. Verify exact firmware versions against Acer's security advisory to determine patch eligibility.

Exploitability

Exploitability is straightforward. The vulnerability requires network access and valid authentication credentials, but no special privileges or user interaction. An attacker with any legitimate account can immediately begin harvesting device data by iterating through serial numbers. The low barrier to exploitation and ease of automating requests for mass data collection elevates practical risk.

Remediation

Acer has released patched firmware versions addressing the authorization check in the summary service endpoint. Users should apply the latest available firmware update to their Connect M6E 5G devices. Verify the patch version in Acer's security advisory to confirm you have the corrected build. In parallel, monitor API logs for suspicious patterns of repeated summary endpoint queries with varying serial number parameters as a sign of active exploitation.

Patch guidance

Contact Acer or visit their support portal to download the latest firmware release for the Connect M6E 5G. Apply the update according to Acer's documented procedures. Before and after patching, document your device serial numbers and baseline access patterns to detect any compromise indicators. If your organization uses automated device management, verify firmware deployment mechanisms support the patched version.

Detection guidance

Hunt for anomalous API access to the summary service endpoint by monitoring request patterns: look for single accounts making repeated calls with different device serial numbers, requests originating from unexpected network segments, or sudden spikes in summary endpoint traffic. Log and alert on failed ownership validation attempts if Acer's logging includes such indicators. Network-based detection should flag clients querying the endpoint with serial number variations outside normal device refresh patterns.

Why prioritize this

Although rated MEDIUM severity with a CVSS score of 5.4, this vulnerability merits timely remediation because it enables systematic data harvesting of connected device information. Organizations managing multiple M6E 5G deployments should treat this as a privacy-tier risk requiring accelerated patching. The ease of exploitation and lack of complex attack prerequisites mean threat actors can quickly operationalize it against exposed user bases.

Risk score, explained

The CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N score of 5.4 reflects network-accessible exploitation requiring valid credentials (low attack complexity, but authentication required), with limited confidentiality and integrity impact and no availability impact. The score appropriately captures the authorization flaw's severity while acknowledging that data exposure is scoped to individual records rather than system-wide compromise or service disruption.

Frequently asked questions