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Vulnerability record · CVE-2011-4531 · published 8 January 2012

CVE-2011-4531: Siemens automation license manager improper input validation vulnerability

Siemens · Automation License Manager

Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted content in a (1) get_target_ocx_param or (2) send_target_ocx_param command.

5.0 CVSS 2.0 Medium EPSS 8.4% · top 5.2% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
8.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted content in a (1) get_target_ocx_param or (2) send_target_ocx_param command.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://aluigi.altervista.org/adv/almsrvx_1-adv.txt Exploit
http://support.automation.siemens.com/WW/llisapi.dll/57252401?func=ll&objId=57252401&objAction=csView&nodeid0=17323948&l Vendor Advisory
http://support.automation.siemens.com/WW/view/en/114358
http://www.us-cert.gov/control_systems/pdf/ICSA-11-361-01.pdf US Government Resource
http://aluigi.altervista.org/adv/almsrvx_1-adv.txt Exploit
http://support.automation.siemens.com/WW/llisapi.dll/57252401?func=ll&objId=57252401&objAction=csView&nodeid0=17323948&l Vendor Advisory
http://support.automation.siemens.com/WW/view/en/114358
http://www.us-cert.gov/control_systems/pdf/ICSA-11-361-01.pdf US Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-43514Siemens automation license manager path traversal vulnerabilityA vulnerability has been identified in Automation License Manager V5 (All versions), Automation License Manager V6 (All versions < V6.0 SP9 Upd4), Te…EPSS 1.5%9.1CVE-2016-8565Siemens automation license manager improper access control vulnerabilitySiemens Automation License Manager (ALM) before 5.3 SP3 allows remote attackers to write to files, rename files, create directories, or delete direct…EPSS 2.9%8.8CVE-2018-11455Siemens automation license manager path traversal vulnerabilityA vulnerability has been identified in Automation License Manager 5 (All versions < 5.3.4.4), Automation License Manager 6 (All versions < 6.0.1). A …EPSS 5.3%7.8CVE-2020-7583Siemens automation license manager improper authorization vulnerabilityA vulnerability has been identified in Automation License Manager 5 (All versions), Automation License Manager 6 (All versions < V6.0.8). The applica…EPSS 0.27%7.5CVE-2022-43513Siemens automation license manager vulnerabilityA vulnerability has been identified in Automation License Manager V5 (All versions), Automation License Manager V6 (All versions < V6.0 SP9 Upd4), Te…EPSS 0.97%7.5CVE-2021-25659Siemens automation license manager uncontrolled resource consumption vulnerabilityA vulnerability has been identified in Automation License Manager 5 (All versions), Automation License Manager 6 (All versions < V6.0 SP9 Update 2). …EPSS 1.0%7.5CVE-2016-8563Siemens automation license manager improper input validation vulnerabilitySiemens Automation License Manager (ALM) before 5.3 SP3 Update 1 allows remote attackers to cause a denial of service (ALM service outage) via crafte…EPSS 3.0%7.5CVE-2011-4529Siemens automation license manager memory buffer overflow vulnerabilityMultiple buffer overflows in Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 allow remote attackers to execute arbitrary code via a…EPSS 6.9%

Source: NIST National Vulnerability Database (record CVE-2011-4531), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.