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CVE-2016-8563

20
FAUCET Score

CVE-2016-8563 is a denial-of-service vulnerability affecting Siemens Automation License Manager (ALM) versions prior to 5.3 SP3 Update 1. An unauthenticated remote attacker can exploit this by sending specially crafted packets to TCP port 4410, causing the ALM service to crash. Rated with a CVSS score of 7.5 (High), this vulnerability requires no user interaction and has a high impact on availability. While there is no known active exploitation, public exploit code, or KEV listing, it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.3CPE matchmatch criteria
cpe:2.3:a:siemens:automation_license_manager:*:sp3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.99%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0299 is in the 75th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ics-cert.us-cert.gov / advisories/ICSA-16-287-02
securityfocus.com / bid/93553
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037011
siemens.com / cert/pool/cert/siemens_security_advisory_ssa-284342.pdf
PatchVendor Advisory