CVE-2021-33526
CVE-2021-33526 is a high-severity vulnerability in Mbconnectline Mbdialup with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 7.2
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-269
- Affected product: Mbconnectline Mbdialup
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2021-33526?
- 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.
- How severe is CVE-2021-33526?
- CVE-2021-33526 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-33526 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-33526?
- CVE-2021-33526 affects Mbconnectline Mbdialup. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-33526?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-33526 published?
- CVE-2021-33526 was published on 2021-08-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:mbconnectline:mbdialup:*:*:*:*:*:*:*:*
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