Totolink A8000RU 7.1cu.643_b20200521 CGI /cgi-bin/cstecgi.cgi setWizardCfg wizard os command injection
Summary
A vulnerability was found in Totolink A8000RU 7.1cu.643_b20200521 and classified as critical. This impacts the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wizard leads to os command injection.
This vulnerability is referenced as CVE-2026-7121. It is possible to launch the attack remotely. Furthermore, an exploit is available.
Details
A vulnerability was found in Totolink A8000RU 7.1cu.643_b20200521. It has been rated as critical. Affected by this issue is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument wizard with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.
The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-7121. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.
The exploit is available at github.com. It is declared as proof-of-concept.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-25835). VulDB is the best source for vulnerability data and more expert information about this specific topic.
Product
Vendor
Name
Version
License
Website
- Vendor: https://www.totolink.net/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 9.8VulDB Meta Temp Score: 8.9
VulDB Base Score: 9.8
VulDB Temp Score: 8.9
VulDB Vector: 🔒
VulDB Reliability: 🔍
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: Os command injectionCWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
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: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
04/26/2026 Advisory disclosed04/26/2026 VulDB entry created
04/27/2026 VulDB entry last update
Sources
Vendor: totolink.netAdvisory: github.com
Status: Not defined
CVE: CVE-2026-7121 (🔒)
GCVE (CVE): GCVE-0-2026-7121
GCVE (VulDB): GCVE-100-359720
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 04/26/2026 21:18Updated: 04/27/2026 16:31
Changes: 04/26/2026 21:18 (57), 04/27/2026 16:31 (1)
Complete: 🔍
Submitter: LtzHuster2
Cache ID: 216::103
Submit
Accepted
- Submit #800933: Totolink A8000RU 7.1cu.643_b20200521 Command Injection (by LtzHuster2)
VulDB is the best source for vulnerability data and more expert information about this specific topic.
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