Root command execution via unauthenticated C2 replies
Published Aug 27, 2026 · Updated Aug 27, 2026
Backdoor C2 code in listed MQWrt router firmware allows remote attackers on the network path to execute arbitrary commands as root. The yunmgrd service sends periodic UDP/10000 registration beacons and accepts plaintext C2 replies without authenticating the server. A network-path position is required; successful channel hijacking also enables DNS rewriting, PPPoE credential disclosure, and reverse SSH access.
Summary
What happened
Backdoor C2 code in listed MQWrt router firmware allows remote attackers on the network path to execute arbitrary commands as root. The yunmgrd service sends periodic UDP/10000 registration beacons and accepts plaintext C2 replies without authenticating the server. A network-path position is required; successful channel hijacking also enables DNS rewriting, PPPoE credential disclosure, and reverse SSH access.
The record
- CVE
- CVE-2026-74232
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- Shenzhen Zhibotong Electronics Co., Ltd.
- Product
- ZBT-AP522
- Classifications
- CWE-506, CWE-300, CAPEC-142, CAPEC-94, CAPEC-248, T1557, T1059.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.0.0.2.014
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Reported exploitation
Technologies
Your stack
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Your stack
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