CVE-2021-25659
Last modified
CVE-2021-25659 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Automation License Manager | >= 5.0.0, < 6.0.9 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-158827.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-158827.pdfPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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