What is CVE-2021-25659?

CVE-2021-25659 is a high-severity vulnerability in Siemens Automation License Manager, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-08-10.

How severe is CVE-2021-25659?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Siemens Automation License Manager

CVE-2021-25659

A vulnerability has been identified in Automation License Manager 5 (All versions), Automation License Manager 6 (All versions < V6.0 SP9 Update 2). Sending specially crafted packets to port 4410/tcp of an affected system could lead to extensive memory being consumed and as such could cause a denial-of-service preventing legitimate users from using the system.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.010 (60.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Siemens Automation_license_manager
Siemens Automation License Manager 5 — versions All versions
Siemens Automation License Manager 6 — versions All versions < V6.0 SP9 Update 2

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

productcert@siemens.com (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25659?: CVE-2021-25659 is a high-severity vulnerability in Siemens Automation License Manager, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-08-10.
How severe is CVE-2021-25659?: High severity. CVSS v3 base score is 7.5 out of 10.