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CVE-2018-25126 affects Shenzhen TVT Digital Technology NVMS-9000 firmware used in numerous white-labeled DVR, NVR, and IP camera products. Configuration services authenticate HTTP/XML requests using hard-coded vendor credentials and pass attacker-controlled XML fields into shell execution contexts without proper argument sanitization. A remote attacker can use the fixed credentials and inject shell metacharacters to execute arbitrary operating-system commands as root. Some models also expose the vulnerable backend through a proprietary TCP service on port 4567 that accepts a magic GUID preface and base64-encoded XML. Firmware released from mid-February 2018 onward reportedly addresses the vulnerability. Shadowserver observed evidence of exploitation on January 28, 2025.
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No public exploit code observed for this vulnerability.
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A critical vulnerability in Shenzhen TVT NVMS-9000 firmware combines hard-coded API credentials with unsanitized shell execution, allowing unauthenticated remote attackers to execute arbitrary commands as root through HTTP/XML configuration endpoints. Some models also expose the vulnerable backend through a proprietary TCP service on port 4567. The record assigns a CVSS v4.0 score of 9.3. Firmware releases from mid-February 2018 onward reportedly address the issue.
A vulnerability in TVT DVR devices, used by the frost malware for propagation.
A critical vulnerability in TVT NVMS-9000 involving hard-coded API credentials and command injection, potentially enabling unauthorized access and remote command execution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.