Tenda AC21 16.03.08.16 Web Management Interface /cgi-bin/DownloadFlash information disclosure
Summary
A vulnerability, which was classified as problematic, was found in Tenda AC21 16.03.08.16. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation results in information disclosure. This vulnerability is known as CVE-2026-2148. It is possible to launch the attack remotely. Furthermore, an exploit is available. Applying restrictive firewalling is recommended.
Details
A vulnerability was found in Tenda AC21 16.03.08.16. It has been classified as problematic. Affected is some unknown functionality of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality.
The advisory is available at github.com. This vulnerability is traded as CVE-2026-2148. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.
The exploit is shared for download at github.com. It is declared as proof-of-concept.
It is possible to mitigate the weakness by firewalling .
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5801). If you want to get best quality of vulnerability data, you may have to visit VulDB.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.tenda.com.cn/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 6.0VulDB Meta Temp Score: 5.8
VulDB Base Score: 5.3
VulDB Temp Score: 4.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔒
CNA Base Score: 5.3
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Information disclosureCWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: FirewallStatus: 🔍
0-Day Time: 🔒
Timeline
02/07/2026 Advisory disclosed02/07/2026 VulDB entry created
02/11/2026 VulDB entry last update
Sources
Vendor: tenda.com.cnAdvisory: github.com
Status: Not defined
CVE: CVE-2026-2148 (🔒)
GCVE (CVE): GCVE-0-2026-2148
GCVE (VulDB): GCVE-100-344850
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 02/07/2026 08:56Updated: 02/11/2026 09:56
Changes: 02/07/2026 08:56 (57), 02/08/2026 13:47 (31), 02/09/2026 06:56 (1), 02/11/2026 09:56 (11)
Complete: 🔍
Submitter: jiefengliang
Cache ID: 216::103
Submit
Accepted
- Submit #747557: Tenda AC21 V16.03.08.16 Missing Critical Step in Authentication (by jiefengliang)
If you want to get best quality of vulnerability data, you may have to visit VulDB.
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