High severity7.5NVD Advisory· Published May 12, 2021· Updated Jun 17, 2026

CVE-2021-27386

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

139

Siemens Foundation/Wincc Runtime Advanced14 versions
cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:*:*:*:*:*:*:*:*+ 13 more
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:update1:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:update2:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:update3:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:update4:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:15.1:update5:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update1:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update2:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update3:*:*:*:*:*:*
- (no CPE)range: < V15.1 Update 6, < V16 Update 4
- (no CPE)range: All versions < V15.1 Update 6
- (no CPE)range: All versions < V16 Update 4
Siemens Foundation/Simatic Hmi Comfort Panels46 versions
cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:*:*:*:*:*:*:*:*+ 45 more
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:16:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_15\"_firmware:16:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_outdoor_panels_7\"_firmware:16:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_22\"_firmware:16:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_comfort_panels_4\"_firmware:16:update3:*:*:*:*:*:*
- (no CPE)range: < V15.1 Update 6, < V16 Update 4
Siemens Foundation/Simatic Hmi Ktp Mobile Panels Ktp400f Firmware11 versions
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:*:*:*:*:*:*:*:*+ 10 more
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp400f_firmware:16:update3:*:*:*:*:*:*
Siemens Foundation/Simatic Hmi Ktp Mobile Panels Ktp700 Firmware22 versions
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:*:*:*:*:*:*:*:*+ 21 more
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700f_firmware:16:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp700_firmware:16:update3:*:*:*:*:*:*
Siemens Foundation/Simatic Hmi Ktp Mobile Panels Ktp900f Firmware11 versions
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:*:*:*:*:*:*:*:*+ 10 more
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900f_firmware:16:update3:*:*:*:*:*:*
Siemens Foundation/SIMATIC HMI KTP Mobile Panels14 versions
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:*:*:*:*:*:*:*:*+ 13 more
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:*:*:*:*:*:*:*:*range: <16
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:update3:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:update4:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:15.1:update5:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:16:-:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:16:update1:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:16:update2:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_ktp900_firmware:16:update3:*:*:*:*:*:*
- (no CPE)range: < V15.1 Update 6, < V16 Update 4
- (no CPE)range: All versions < V15.1 Update 6
- (no CPE)range: All versions < V16 Update 4
Siemens Foundation/SINAMICS GH150
cpe:2.3:o:siemens:sinamics_gh150_firmware:*:*:*:*:*:*:*:*
Siemens Foundation/Sinamics G150 Firmware2 versions
cpe:2.3:o:siemens:sinamics_gl150_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:siemens:sinamics_gl150_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sinamics_gm150_firmware:*:*:*:*:*:*:*:*
Siemens Foundation/Sinamics Sh150 Firmware
cpe:2.3:o:siemens:sinamics_sh150_firmware:*:*:*:*:*:*:*:*
Siemens Foundation/Sinamics S150 Firmware7 versions
cpe:2.3:o:siemens:sinamics_sl150_firmware:*:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:o:siemens:sinamics_sl150_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sinamics_sm150_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sinamics_sm150i_firmware:*:*:*:*:*:*:*:*
- (no CPE)range: All versions
- (no CPE)range: All versions
- (no CPE)range: All versions
- (no CPE)range: All versions
Siemens Foundation/Sinamics S120 Firmware
cpe:2.3:o:siemens:sinamics_sm120_firmware:*:*:*:*:*:*:*:*
Siemens Foundation/SINAMICSllm-fuzzy
Range: All versions
Siemens Foundation/SIMATIC HMI Comfort Outdoor Panels V15 7" & 15" (incl. SIPLUS variants)cpe-rescue2 versions
All versions < V15.1 Update 6+ 1 more
- (no CPE)range: All versions < V15.1 Update 6
- (no CPE)range: All versions < V16 Update 4
Siemens Foundation/SIMATIC HMI Comfort Panels V15 4" - 22" (incl. SIPLUS variants)cpe-rescue2 versions
All versions < V15.1 Update 6+ 1 more
- (no CPE)range: All versions < V15.1 Update 6
- (no CPE)range: All versions < V16 Update 4
Siemens Foundation/Sinamics G150cpe-rescue
Range: All versions
Siemens/SINAMICS GL150 (with option X30)v5
Range: All versions
Siemens/SINAMICS GM150 (with option X30)v5
Range: All versions
Siemens Foundation/Sinamics S120cmcpe-rescue
Range: All versions

Patches

Vulnerability mechanics

References

cert-portal.siemens.com/productcert/pdf/ssa-286838.pdfnvdVendor Advisory
cert-portal.siemens.com/productcert/pdf/ssa-538778.pdfnvdVendor Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-131-12nvdThird Party AdvisoryUS Government Resource

News mentions

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cvss	0.488
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000