Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 encrypts configuration backups with a hardcoded DES key using single DES in ECB mode. An attacker who obtains a backup file can decrypt it to recover all stored credentials including admin password, WiFi PSK, and DDNS credentials.
History

Wed, 03 Jun 2026 21:15:00 +0000

Type Values Removed Values Added
Title Hardcoded DES Key Enables Decryption of Backups and Exposure of Credentials
Weaknesses CWE-200
CWE-256
CWE-310

Wed, 03 Jun 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-798
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
Title Hardcoded DES Key Enables Decryption of Backups and Exposure of Credentials
Weaknesses CWE-200
CWE-256
CWE-310

Wed, 03 Jun 2026 17:45:00 +0000

Type Values Removed Values Added
Description Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 encrypts configuration backups with a hardcoded DES key using single DES in ECB mode. An attacker who obtains a backup file can decrypt it to recover all stored credentials including admin password, WiFi PSK, and DDNS credentials.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-03T18:32:24.969Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36606

cve-icon Vulnrichment

Updated: 2026-06-03T18:32:19.105Z

cve-icon NVD

Status : Received

Published: 2026-06-03T18:16:21.677

Modified: 2026-06-03T19:16:31.350

Link: CVE-2026-36606

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-03T21:00:06Z