How severe is CVE-2020-15798?

CVE-2020-15798 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15798 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15798?

CVE-2020-15798 primarily affects Siemens Simatic Hmi Comfort Panels Firmware. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15798?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-15798 published?

CVE-2020-15798 was published on 2021-02-09 and last updated on 2026-06-17.

CVE-2020-15798

CVE-2020-15798 is a critical-severity vulnerability in Siemens Simatic Hmi Comfort Panels Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 9.3
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Siemens Simatic Hmi Comfort Panels Firmware
Published: 2021-02-09
Last modified: 2026-06-17

Description

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)

Frequently asked questions

What is CVE-2020-15798?: 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)
How severe is CVE-2020-15798?: CVE-2020-15798 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15798 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15798?: CVE-2020-15798 primarily affects Siemens Simatic Hmi Comfort Panels Firmware. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15798?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-15798 published?: CVE-2020-15798 was published on 2021-02-09 and last updated on 2026-06-17.

References

Affected products (18)

cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:16.0:-:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:16.0:update1:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:16.0:update2:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:16.0:update3:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware:16.0:-:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware:16.0:update1:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware:16.0:update2:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_hmi_ktp_mobile_panels_firmware:16.0:update3:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_gh150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_gl150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_gm150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_sh150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_sl150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_sm150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_sm120_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_sm150i_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Siemens Simatic Hmi Comfort Panels Firmware

CVE-2020-15786 — Critical (CVSS 9.8): A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions <…
CVE-2019-6572 — Critical (CVSS 9.1): A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI…
CVE-2018-13814 — High (CVSS 8.8): A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V14), SIMATIC HMI Comfort…
CVE-2018-13813 — High (CVSS 8.1): A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15 Update 4), SIMATIC HMI…
CVE-2022-40227 — High (CVSS 7.5): A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V17 Update…
CVE-2019-6568 — High (CVSS 7.5): The webserver of the affected devices contains a vulnerability that may lead to a denial of service condition. An…

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