What is CVE-2020-35559?

CVE-2020-35559 is a medium-severity vulnerability in Mbconnectline Mbconnect24, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2021-02-16.

How severe is CVE-2020-35559?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Mbconnectline Mbconnect24

CVE-2020-35559

An issue was discovered in MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 through 2.6.2. There is an unused function that allows an authenticated attacker to use up all available IPs of an account and thus not allow creation of new devices and users.

Vulnerability class: DoS (Denial of Service)

Published 2021-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.008 (55.4th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

mbconnectline.com/security-advice/ (Vendor Advisory)
cert.vde.com/de-de/advisories/vde-2021-003 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-35559?: CVE-2020-35559 is a medium-severity vulnerability in Mbconnectline Mbconnect24, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2021-02-16.
How severe is CVE-2020-35559?: Medium severity. CVSS v3 base score is 4.3 out of 10.