CVE-2021-27386
No exploitation reported by the sources we read.
- Published2021-05-12
- Fixed in16 · 15.1
- WeaknessCWE-401
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 Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V15.1 Update 6), SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V16 Update 4), SIMATIC WinCC Runtime Advanced V15 (All versions < V15.1 Update 6), SIMATIC WinCC Runtime Advanced V16 (All versions < V16 Update 4), SINAMICS GH150 (All versions), SINAMICS GL150 (with option X30) (All versions), SINAMICS GM150 (with option X30) (All versions), SINAMICS SH150 (All versions), SINAMICS SL150 (All versions), SINAMICS SM120 (All versions), SINAMICS SM150 (All versions), SINAMICS SM150i (All versions). SmartVNC has a heap allocation leak vulnerability in the device layout handler on client side, which could result in a Denial-of-Service condition.
Timeline
dates in UTC- 2021-05-1214:15CVE 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-2021-27386?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27386?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 |
|---|---|---|---|
| 16.x | < 16 | 16 | NVD |
| 15.1 | < 15.1 | 15.1 | NVD |
| 16.x | = 16 | no fix published | NVD |
| 15.1 | = 15.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 16.x | < 16 | 16 | NVD |
| 15.1 | < 15.1 | 15.1 | NVD |
| 16.x | = 16 | no fix published | NVD |
| 15.1 | = 15.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 16.x | < 16 | 16 | NVD |
| 15.1 | < 15.1 | 15.1 | NVD |
| 16.x | = 16 | no fix published | NVD |
| 15.1 | = 15.1 | no fix published | NVD |
15 more products 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 SINAMICS Medium Voltage Products Remote Access (Update B)
SINAMICS GH150 · SINAMICS GL150 (with option X30) · SINAMICS GM150 (with option X30) · +5 more
Siemens SIMATIC SmartVNC HMI WinCC Products (Update B)
SIMATIC HMI Comfort Outdoor Panels V15 7" & 15" (incl. SIPLUS variants) · SIMATIC HMI Comfort Outdoor Panels V16 7" & 15" (incl. SIPLUS variants) · SIMATIC HMI Comfort Panels V15 4" - 22" (incl. SIPLUS variants) · +5 more
Fix
- Update Siemens simatic hmi comfort outdoor panels 15\" firmware to 16 · 15.1
- Vendor fix CISA ICSA-21-131-12 · 3 productsUpdate SIMATIC WinCC (TIA Portal) to V15.1 Update 6, and then update panel to V15.1 Update 6
- Vendor fix CISA ICSA-21-131-12 · 3 productsUpdate SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version
- Vendor fix CISA ICSA-21-131-12 · 1 productUpdate to V15.1 Update 6
- Vendor fix CISA ICSA-21-131-12 · 1 productUpdate to V16 Update 4 or later version
- Mitigation from the vendor CISA ICSA-21-131-04 · 1 productAs only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GH150 to V16 Update 4 or later version
- Mitigation from the vendor CISA ICSA-21-131-04 · 5 productshttps://support.industry.siemens.com/cs/ww/en/view/109746530/
Advisories and patches
- cert-portal.siemens.comVendor Advisory
- 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:N/I:N/A:H
- Published
- 2021-05-12
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-27386?
Is CVE-2021-27386 actively exploited?
What is the CVSS score for CVE-2021-27386?
Running SIMATIC HMI Comfort Outdoor? Hear about its next vulnerability
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.