Totolink A8000RU 7.1cu.643_b20200521 CGI /cgi-bin/cstecgi.cgi setWiFiEasyGuestCfg merge os command injection
Summary
A vulnerability identified as critical has been detected in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument merge causes os command injection.
This vulnerability is handled as CVE-2026-7244. The attack can be initiated remotely. Additionally, an exploit exists.
Details
A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521 and classified as critical. Affected by this vulnerability is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument merge with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.
It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-7244. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.
It is possible to download the exploit 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.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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
04/27/2026 Advisory disclosed04/27/2026 VulDB entry created
04/27/2026 VulDB entry last update
Sources
Vendor: totolink.netAdvisory: github.com
Status: Not defined
CVE: CVE-2026-7244 (🔒)
GCVE (CVE): GCVE-0-2026-7244
GCVE (VulDB): GCVE-100-359851
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 04/27/2026 19:28Changes: 04/27/2026 19:28 (57)
Complete: 🔍
Submitter: LtzHust2
Cache ID: 216::103
Submit
Accepted
- Submit #803267: Totolink A8000RU 7.1cu.643_b20200521 Command Injection (by LtzHust2)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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