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CVE-2011-4531

30
FAUCET Score

CVE-2011-4531 describes a denial-of-service vulnerability in Siemens Automation License Manager (ALM) versions 4.0 through 5.1+SP1+Upd1. Remote attackers can crash the ALM daemon by sending crafted content within specific commands, leading to a NULL pointer dereference. This vulnerability has a CVSS score of 5.0, indicating a medium severity, with low attack complexity and no authentication required, resulting in partial availability impact. While there is an ExploitDB entry for multiple ALM vulnerabilities, there is no indication of active exploitation, and it lacks Metasploit or Nuclei modules, with minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.1CPE matchmatch criteria
cpe:2.3:a:siemens:automation_license_manager:*:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.88%
Probability of exploitation in next 30 days
EPSS Percentile
94.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-18165 · Nov 28, 2011
This CVE's current EPSS score of 0.0888 is in the 93rd percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

aluigi.altervista.org / adv/almsrvx_1-adv.txt
Exploit
support.automation.siemens.com / WW/llisapi.dll/57252401
Vendor Advisory
support.automation.siemens.com / WW/view/en/114358
us-cert.gov / control_systems/pdf/ICSA-11-361-01.pdf
US Government Resource