OS Command Injection in mbDIALUP <= 3.9R0.0
Priority MEDIUM 49CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In MB connect line mbDIALUP versions <= 3.9R0.0 a remote attacker can send a specifically crafted HTTP request to the service running with NT AUTHORITY\SYSTEM that will not correctly validate the input. This can lead to an arbitrary code execution with the privileges of the service.
Why it matters now
EPSS 0.04524 91st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MB connect line | mbDIALUP | 3.9R0.0 – 3.9R0.0 | — | No fix listed | CNA |
- mbDIALUP VendorMB connect line Affected 3.9R0.0 – 3.9R0.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mbconnectline:mbdialup:*:*:*:*:*:*:*:* | up to 3.9r0.0 | Vulnerable | MB connect line |
- cpe:2.3:a:mbconnectline:mbdialup:*:*:*:*:*:*:*:* Versions up to 3.9r0.0 Vulnerable ·MB connect line
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33527
- 2026-10-03 Alias added: GHSA-hrmp-939q-g4mq
References
More MB connect line Mbdialup vulnerabilities
- TI-2021-12921 Privilege escalation in mbDIALUP <= 3.9R0.0 CVSS 3.1HIGH 7.8
Sources
- CVE-2021-33527 · CVE Program
- CVE-2021-33527 · NVD
- FIRST EPSS
- GHSA-hrmp-939q-g4mq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences