TC155: Incorrect Privilege Assignment
CVE-2025-14749 is a high-severity incorrect privilege assignment vulnerability in TC155 from Ningyuanda, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected TC155 versions: 57.0.2.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.78% chance of exploitation within 30 days, higher than 57% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of TC155 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ningyuanda | TC155 | 57.0.2.0 | Not stated |
| Shenzhenningyuandatechnology | Tc155 Firmware | 57.0.2.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 2.1 | Low | CNA (vuldb.com) |
| CVSS 3.1 | 6.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 8.8 | High | NVD |
| CVSS 2.0 | 5.8 | Medium | CNA (vuldb.com) |
Official description
A vulnerability was identified in Ningyuanda TC155 57.0.2.0. This impacts an unknown function of the file /onvif/device_service of the component ONVIF PTZ Control Interface. The manipulation leads to improper access controls. The attack requires being on the local network. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Privilege Assignment
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
More Incorrect Privilege Assignment vulnerabilities (CWE-266)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.336522Third Party Advisory, VDB Entry
- vuldb.com/?submit.707198Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- github.com/pwnpwnpur1n/IoT-advisories/blob/main/TC155-Unauth-PTZ-Remote-Control.mdExploit, Third Party Advisory
Other references
- vuldb.com/?ctiid.336522Permissions Required, VDB Entry
Recent Incorrect Privilege Assignment vulnerabilities
- 7.2 High severity
- 9.1 Critical severity
- 7.5 High severity
- 8.8 High severity
- 7.3 High severity
- 8.8 High severity
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