CVE-2016-8563
No exploitation reported by the sources we read.
- Published2016-10-13
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Siemens Automation License Manager (ALM) before 5.3 SP3 Update 1 allows remote attackers to cause a denial of service (ALM service outage) via crafted packets to TCP port 4410.
Timeline
dates in UTC- 2016-10-1310:59CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-8563?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-8563?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.3 | ≤ 5.3 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Siemens Automation License Manager Vulnerabilities
Siemens ALM: <V5.3_SP3_Update_1
Fix
- Mitigation from the vendor CISA ICSA-16-287-02 · 1 productSiemens has released ALM Version V5.3 SP3 Update 1, which fixes the vulnerabilities. Siemens strongly recommends users to update to the new version. It can be found on the Siemens web site at the following location: (https://support.industry.siemens.com/cs/ww/en/view/114358)
- Mitigation from the vendor CISA ICSA-16-287-02 · 1 productSiemens recommends only allowing connections from the local subnet to the ALM default Port 4410/TCP and blocking requests from other networks. These products should only be operated within trusted networks.
- Mitigation from the vendor CISA ICSA-16-287-02 · 1 productSiemens strongly recommends that users protect network access PC-based automation systems with appropriate mechanisms. Siemens also advises that users configure the operational environment according to Siemens’ operational guidelines for industrial security: (https://www.siemens.com/cert/operationa…
- Mitigation from the vendor CISA ICSA-16-287-02 · 1 productFor more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-284342 at the following location: (http://www.siemens.com/cert/advisories)
Advisories and patches
- www.siemens.comPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.07.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score3.0 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2016-10-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2016-8563?
Is CVE-2016-8563 actively exploited?
What is the CVSS score for CVE-2016-8563?
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Related vulnerabilities
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