What it is
CVE-2018-25126 is an unauthenticated TVT NVMS-9000 Hard-coded API Credentials & Command Injection. Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000 firmware (used by many white-labeled DVR/NVR/IPC products)...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2018-25126
TVT NVMS-9000 Hard-coded API Credentials & Command Injection
Shenzhen TVT Digital Technology / NVMS-9000 · affected before mid-February firmware builds
- Severity
- CVSS 9.3 · Critical
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 4.1%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.
Who is affected?
Shenzhen TVT Digital Technology / NVMS-9000 affected before mid-february firmware builds.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Shenzhen TVT Digital Technology Co., Ltd
Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000 firmware (used by many white-labeled DVR/NVR/IPC products) contains hardcoded API credentials and an OS command injection flaw in its configuration services. The web/API interface accepts HTTP/XML requests authenticated with a fixed vendor credential string and passes user-controlled fields into shell execution contexts without proper argument sanitization.
An unauthenticated remote attacker can leverage the hard-coded credential to access endpoints such as /editBlackAndWhiteList and inject shell metacharacters inside XML parameters, resulting in arbitrary command execution as root. The same vulnerable backend is also reachable in some models through a proprietary TCP service on port 4567 that accepts a magic GUID preface and base64-encoded XML, enabling the same command injection sink. Firmware releases from mid-February 2018 and later are reported to have addressed this issue. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-28 UTC.
Vendor
Product
Affected
Status
Shenzhen TVT Digital Technology Co., Ltd.
Affected
NVMS-9000
Before mid-February firmware builds
Affected
- Published
- 24 Nov 2025
- Exploitation Reported
- 24 Nov 2025
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2018-25126
- Vendor Advisory — web.archive.org web.archive.org · Vendor Advisory https://web.archive.org/web/20180614014914/http://en.tvt.net.cn:80/ne...
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/tvt-nvms9000-hardcoded-api-crede...
- GitHub — mcw0/PoC github.com · Exploit https://github.com/mcw0/PoC/blob/master/TVT_and_OEM_IPC_NVR_DVR_RCE_B...
- Exploit — qkl.seebug.org qkl.seebug.org · Exploit https://qkl.seebug.org/vuldb/ssvid-97217
- Related — blogs.juniper.net blogs.juniper.net · Related https://blogs.juniper.net/en-us/threat-research/iot-botnet-exploiting...
Exploitation evidence
Why Previdian marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
The Shadowserver
A trusted third party reported exploitation.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the Previdian Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-11-24 20:30 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- User-Agents
- Callback hosts
- 0
- 0
- 0
Request targets and User-Agents available in Pro. Callback host details available in Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v4.0
9.3
Critical
Potential damage if exploited. Separate from whether attackers are using it.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
4.1%
Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.
Timeline
From disclosure to observed exploitation
-
20:30 UTC
CVE published
Vulnerability disclosed publicly
-
20:30 UTC
Added to Previdian KEV Feed
High-confidence, third-party attested exploitation
-
18:22 UTC
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2018-25126
Sample API response{
"cve_id": "CVE-2018-25126",
"confidence": "High",
"cvss_score": 9.3,
"cvss_estimated": false,
"epss_score": 0.04071,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}