W30E V2: Unverified Password Change
CVE-2026-24440 is a high-severity unverified password change vulnerability in W30E V2 from Shenzhen Tenda Technology, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected W30E V2 versions: 16.01.0.19(5037) and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.31% 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 W30E V2 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Shenzhen Tenda Technology | W30E V2 | 16.01.0.19(5037) and earlier | Not stated |
| Tenda | W30e Firmware | 16.01.0.19\(5037\) and earlier | 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
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- 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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.7 | High | CNA (vulncheck.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Shenzhen Tenda W30E V2 firmware versions up to and including V16.01.0.19(5037) allow account passwords to be changed through the maintenance interface without requiring verification of the existing password. This enables unauthorized password changes when access to the affected endpoint is obtained.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unverified Password Change
When setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.
How developers prevent this class of flaw
- When prompting for a password change, force the user to provide the original password in addition to the new password.
- Do not use forgotten password functionality. But if you must, ensure that you are only providing information to the actual user, e.g. by using an email address or challenge question that the legitimate user already provided in the past; do not allow the current user to change this identity information until the correct password has been provided.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
Other references
- tendacn.com/product/W30EProduct
Other vulnerabilities in W30E V2
- 9.8 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 8.8 High severity
Recent Unverified Password Change vulnerabilities
- 8.7 High severity
- 7.5 High severity
- 8.5 High severity
- 9.8 Critical severity
- 8.3 High severity
- 9.8 Critical severity
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