Privilege escalation in mbDIALUP <= 3.9R0.0
Priority LOW 34CWE-269Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
In MB connect line mbDIALUP versions <= 3.9R0.0 a low privileged local attacker can send a command to the service running with NT AUTHORITY\SYSTEM instructing it to execute a malicous OpenVPN configuration resulting in arbitrary code execution with the privileges of the service.
Why it matters now
EPSS 0.00253 16th 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-2021-33526
- 2026-10-03 Alias added: GHSA-2992-6547-hhfp
References
More MB connect line Mbdialup vulnerabilities
- TI-2021-12922 OS Command Injection in mbDIALUP <= 3.9R0.0 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-33526 · CVE Program
- CVE-2021-33526 · NVD
- FIRST EPSS
- GHSA-2992-6547-hhfp · 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