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CVE-2021-25659

HIGH
7.5
CVSS Score
Published: August 10, 2021 at 10:35 AM UTC
Updated: June 17, 2026 at 03:42 AM UTC
1 product affected across 1 vendorAutomation License Manager

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Automation License Manager· Siemens
95%
5.0.0 ≤ v < 6.0.9All versions < V6.0 SP9 Update 2
Affected range stops below 6.0.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-158827.pdf

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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