Tenda AC21 16.03.08.16 Web Management Interface /cgi-bin/DownloadLog information disclosure
Summary
A vulnerability, which was classified as problematic, has been found in Tenda AC21 16.03.08.16. Affected is an unknown function of the file /cgi-bin/DownloadLog of the component Web Management Interface. The manipulation leads to information disclosure. This vulnerability is traded as CVE-2026-2147. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is recommended to apply restrictive firewalling.
Details
A vulnerability was found in Tenda AC21 16.03.08.16 and classified as problematic. This issue affects an unknown functionality of the file /cgi-bin/DownloadLog of the component Web Management Interface. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality.
The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-2147. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1592 for this issue.
The exploit is available at github.com. It is declared as proof-of-concept.
Addressing this vulnerability is possible by firewalling .
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5802). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
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: 5.3VulDB Meta Temp Score: 5.0
VulDB Base Score: 5.3
VulDB Temp Score: 4.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
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
02/09/2026 VulDB entry last update
Sources
Vendor: tenda.com.cnAdvisory: github.com
Status: Not defined
CVE: CVE-2026-2147 (🔒)
GCVE (CVE): GCVE-0-2026-2147
GCVE (VulDB): GCVE-100-344849
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 02/07/2026 08:56Updated: 02/09/2026 06:56
Changes: 02/07/2026 08:56 (57), 02/08/2026 11:26 (31), 02/09/2026 06:56 (1)
Complete: 🔍
Submitter: 942384053
Cache ID: 216::103
Submit
Accepted
- Submit #747429: Tenda AC21 V16.03.08.16 Missing Critical Step in Authentication (by 942384053)
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
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