CVE-2020-15786
No exploitation reported by the sources we read.
- Published2020-09-09
- WeaknessCWE-307
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
A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
Timeline
dates in UTC- 2020-09-0919:15CVE 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-2020-15786?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-15786?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 |
|---|---|---|---|
| 14.x | ≤ 14 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
1 more product in the sources.
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 SIMATIC HMI Products (Update A)
SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) · SIMATIC HMI Comfort Panels (incl. SIPLUS variants) · SIMATIC HMI Mobile Panels · +1 more
Fix
- Vendor fix CISA ICSA-20-252-06 · 3 productsUpdate to V16 Update 3
- Vendor fix CISA ICSA-20-252-06 · 1 productUpdate to V16 Update 5
- Mitigation from the vendor CISA ICSA-20-252-06 · 4 productsApply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- Mitigation from the vendor CISA ICSA-20-252-06 · 4 productsFor Unified Comfort Panels using SmartClient: The password truncation (CVE-2020-15787) cannot be resolved due to RFC 6143 and is limited to 8 characters. It is recommended to use complex passwords
Advisories and patches
- cert-portal.siemens.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2020-09-09
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-15786?
Is CVE-2020-15786 actively exploited?
What is the CVSS score for CVE-2020-15786?
Running SIMATIC HMI Basic Panels? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.