# CVE-2026-49203: Acer Connect M6E improper authentication in eSIM management API

Source: https://junglewise.ai/threats/cve-2026-49203-acer-connect-m6e-improper-authentication-in-esim-management-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-04. Updated: 2026-06-04  
License: CC BY 4.0 with a link back

CVE-2026-49203 · Severity: info · CVSS 7.2 · Published 2026-06-04

The Acer Connect M6E 5G portable router contains a security flaw in how it manages cellular eSIM profiles. Because the management interface does not verify who is making a request, an unauthorized person on the same network could remotely rewrite or delete the device's cellular connection profiles. This could lead to a complete loss of internet connectivity or the redirection of cellular service to an unauthorized account.

Technologies: [Acer Connect M6E 5G Portable WiFi Router](https://junglewise.ai/threats/technologies/connect-m6e-5g-portable-wifi-router). Vendors: [Acer](https://junglewise.ai/threats/vendors/acer).

## Quick answers

**Is CVE-2026-49203 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49203 being exploited in the wild.

**How severe is CVE-2026-49203?** Informational severity, with a CVSS score of 7.2, published 4 June 2026.

**Which products and versions are affected?** Acer Connect M6E 5G Portable WiFi Router M6E_AI_1.00.000019 and earlier.

**Is there a fix for CVE-2026-49203?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-49203 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-49203?** Check whether you run Acer Connect M6E 5G Portable WiFi Router at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is classified as Improper Authentication (CWE-287) within the eSIM management API of the Acer Connect M6E 5G router. Specifically, crucial endpoints responsible for cellular eSIM allocation do not perform authorization checks on callers. An unauthenticated attacker with adjacent network access can exploit this to modify or delete remote eSIM profiles. Acer has acknowledged the issue and is working on a firmware update to implement token-based validation and device ID binding for these endpoints.

## Affected products

- Acer Connect M6E 5G Portable WiFi Router M6E_AI_1.00.000019 and earlier

## Timeline

- 2026-06-04: advisory: Initial disclosure by Acer and NVD publication

## References

- [https://community.acer.com/en/kb/articles/19707](https://community.acer.com/en/kb/articles/19707)

## Related threats

- [Acer Connect M6E hard-coded AES keys in OTA application](https://junglewise.ai/threats/cve-2026-50226-acer-connect-m6e-hard-coded-aes-keys-in-ota-application)
- [Acer Connect M6E missing bot mitigation in registration endpoint](https://junglewise.ai/threats/cve-2026-50225-acer-connect-m6e-missing-bot-mitigation-in-registration-endpoint)
- [Acer Connect M6E 5G Router Information Exposure in Web Admin Panel](https://junglewise.ai/threats/cve-2026-50224-acer-connect-m6e-5g-router-information-exposure-in-web-admin)
- [Acer Connect M6E shared global API token in /v1/Plan service](https://junglewise.ai/threats/cve-2026-50214-acer-connect-m6e-shared-global-api-token-in-v1-plan-service)
- [Acer Connect M6E IDOR in account validation endpoint](https://junglewise.ai/threats/cve-2026-50213-acer-connect-m6e-idor-in-account-validation-endpoint)