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High severity · published Aug 10, 2021
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)
7.5
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AL
Automation License Manager · Siemens
5.0.0 before 6.0.9 · source: NVD
Affected product
AL
Automation License Manager
Siemens
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-25659
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-25659
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-158827.pdf
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