AC18: Weak Password Requirements
CVE-2025-8182 is a high-severity weak password requirements vulnerability in AC18 from Tenda, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected AC18 versions: 15.03.05.19. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of AC18 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Tenda | AC18 | 15.03.05.19 | Not stated |
| Tenda | Ac18 Firmware | 15.03.05.19 | 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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 2.9 | Low | CNA (vuldb.com) |
| CVSS 3.1 | 5.6 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.4 | High | NVD |
| CVSS 2.0 | 5.1 | Medium | CNA (vuldb.com) |
Official description
A vulnerability has been found in Tenda AC18 15.03.05.19 and classified as problematic. This vulnerability affects unknown code of the file /etc_ro/smb.conf of the component Samba. The manipulation leads to weak password requirements. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Weak Password Requirements
The product does not require that users should have strong passwords.
How developers prevent this class of flaw
- Consider a second authentication factor beyond the password, which prevents the password from being a single point of failure. See CWE-308 for further information.
- Consider implementing a password complexity meter to inform users when a chosen password meets the required attributes.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.317596Third Party Advisory, VDB Entry
- vuldb.com/?submit.621977Third Party Advisory, VDB Entry
- notion.so/23a54a1113e7802abfabf1275a555f48Third Party Advisory
Other references
- vuldb.com/?ctiid.317596Permissions Required
- tenda.com.cn/Product
Other vulnerabilities in AC18
- 9.1 Critical severity
- 10.0 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent Weak Password Requirements vulnerabilities
- 9.8 Critical severity
- 7.3 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.1 High severity
- 9.8 Critical severity
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