How severe is CVE-2021-37194?

CVE-2021-37194 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-37194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37194?

CVE-2021-37194 primarily affects Siemens Comos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37194?

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

When was CVE-2021-37194 published?

CVE-2021-37194 was published on 2022-02-09 and last updated on 2026-06-17.

CVE-2021-37194

CVE-2021-37194 is a high-severity vulnerability in Siemens Comos with a CVSS 3.x base score of 7.5. 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-434.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Siemens Comos
Published: 2022-02-09
Last modified: 2026-06-17

Description

A vulnerability has been identified in COMOS V10.2 (All versions only if web components are used), COMOS V10.3 (All versions < V10.3.3.3 only if web components are used), COMOS V10.4 (All versions < V10.4.1 only if web components are used). The COMOS Web component of COMOS allows to upload and store arbitrary files at the webserver. This could allow an attacker to store malicious files.

Frequently asked questions

What is CVE-2021-37194?: A vulnerability has been identified in COMOS V10.2 (All versions only if web components are used), COMOS V10.3 (All versions < V10.3.3.3 only if web components are used), COMOS V10.4 (All versions < V10.4.1 only if web components are used). The COMOS Web component of COMOS allows to upload and store arbitrary files at the webserver. This could allow an attacker to store malicious files.
How severe is CVE-2021-37194?: CVE-2021-37194 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-37194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37194?: CVE-2021-37194 primarily affects Siemens Comos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37194?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-37194 published?: CVE-2021-37194 was published on 2022-02-09 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-995338.pdf

Affected products (2)

cpe:2.3:a:siemens:comos:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:comos:10.2:*:*:*:*:*:*:*

More vulnerabilities in Siemens Comos

CVE-2023-24482 — Critical (CVSS 10.0): A vulnerability has been identified in COMOS V10.2 (All versions), COMOS V10.3.3.1 (All versions < V10.3.3.1.45), COMOS…
CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
CVE-2023-46601 — Critical (CVSS 9.6): A vulnerability has been identified in COMOS (All versions). The affected application lacks proper access controls in…
CVE-2023-43505 — Critical (CVSS 9.6): A vulnerability has been identified in COMOS (All versions). The affected application lacks proper access controls in…
CVE-2023-43504 — Critical (CVSS 9.6): A vulnerability has been identified in COMOS (All versions < V10.4.4). Ptmcast executable used for testing cache…
CVE-2021-45046 — Critical (CVSS 9.0): It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default…

All CVEs affecting Siemens Comos →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →