CVE-2020-15798· NVD / CVE Program· CNA siemens

A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl.

A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V16 Update 3a), SIMATIC HMI KTP Mobile Panels (All versions < V16 Update 3a), 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). Affected devices with enabled telnet service do not require authentication for this service. This could allow a remote attacker to gain full access to the device. (ZDI-CAN-12046)

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded

Published: Feb 9, 2021
Updated: Jun 16, 2026
EPSS: 5.2% · 92th percentile
CWE: CWE-306

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Action score

Plan

Add it to your regular patch cycle.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 5.2%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

Vendor	Product	CPE
siemens	simatic hmi comfort panels firmware	cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware
siemens	simatic hmi comfort panels	cpe:2.3:h:siemens:simatic_hmi_comfort_panels
siemens	simatic hmi ktp mobile panels firmware	cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware
siemens	simatic hmi ktp mobile panels	cpe:2.3:h:siemens:simatic_hmi_ktp_mobile_panels
siemens	sinamics gh150 firmware	cpe:2.3:o:siemens:sinamics_gh150_firmware
siemens	sinamics gh150	cpe:2.3:h:siemens:sinamics_gh150
siemens	sinamics gl150 firmware	cpe:2.3:o:siemens:sinamics_gl150_firmware
siemens	sinamics gl150	cpe:2.3:h:siemens:sinamics_gl150
siemens	sinamics gm150 firmware	cpe:2.3:o:siemens:sinamics_gm150_firmware
siemens	sinamics gm150	cpe:2.3:h:siemens:sinamics_gm150
siemens	sinamics sh150 firmware	cpe:2.3:o:siemens:sinamics_sh150_firmware
siemens	sinamics sh150	cpe:2.3:h:siemens:sinamics_sh150

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

siemens simatic hmi comfort panels firmwarebefore 16.0
siemens simatic hmi comfort panels firmware16.0
siemens simatic hmi ktp mobile panels firmwarebefore 16.0
siemens simatic hmi ktp mobile panels firmware16.0
siemens sinamics gh150 firmwareall versions
siemens sinamics gl150 firmwareall versions
siemens sinamics gm150 firmwareall versions
siemens sinamics sh150 firmwareall versions
siemens sinamics sl150 firmwareall versions
siemens sinamics sm120 firmwareall versions
siemens sinamics sm150 firmwareall versions
siemens sinamics sm150i firmwareall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (siemens). Independent of NVD's CPE analysis and usually ahead of it.

Siemens SIMATIC HMI Comfort Panels (incl. SIPLUS variants)
- All versions < V16 Update 3aaffected
Siemens SIMATIC HMI KTP Mobile Panels
- All versions < V16 Update 3aaffected
Siemens SINAMICS GH150
- All versionsaffected
Siemens SINAMICS GL150 (with option X30)
- All versionsaffected
Siemens SINAMICS GM150 (with option X30)
- All versionsaffected
Siemens SINAMICS SH150
- All versionsaffected
Siemens SINAMICS SL150
- All versionsaffected
Siemens SINAMICS SM120
- All versionsaffected
Siemens SINAMICS SM150
- All versionsaffected
Siemens SINAMICS SM150i
- All versionsaffected

Same product

siemens: all records

Other highest-scoring records for the same primary product.

CVE-2019-6572A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI Comfort Outdoor Pane
37Monitor
CVE-2018-13814A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V14), SIMATIC HMI Comfort Outdoor Panels 7" & 15"
36Monitor
CVE-2018-13813A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15 Update 4), SIMATIC HMI Comfort Outdoor Panels
33Monitor
CVE-2018-13812A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15 Update 4), SIMATIC HMI Comfort Outdoor Panels
31Monitor
CVE-2022-40227A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl.
30Monitor
CVE-2019-6576A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI Comfort Outdoor Pane
27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-21-0094 · Feb 3, 2021(Siemens HMI Comfort ve HMI KTP Mobil Endüstriyel Ürünler Zafiyeti)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1// Added for the support team2app.post("/maintenance/reset", resetDevice);

Fixed

1if (config.maintenanceEnabled) {2  app.post(3    "/maintenance/reset",4    requireSession, requireRole("admin"), resetDevice5  );6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

No Noroxi analysis for this record yet

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Data sources and verification

CNA: siemens

CVE.org (CNA)Jun 2, 2026, 6:59 PM UTC
CISA ADPJun 2, 2026, 6:59 PM UTC
NVDJun 16, 2026, 10:57 PM UTC
FIRST EPSSOct 3, 2026, 12:00 AM UTC

Each line is when that source was last processed for this record.

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