How severe is CVE-2021-37201?

CVE-2021-37201 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-37201 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37201?

CVE-2021-37201 primarily affects Siemens Sinec Network Management System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37201?

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-2021-37201 published?

CVE-2021-37201 was published on 2021-09-14 and last updated on 2026-06-17.

CVE-2021-37201

CVE-2021-37201 is a high-severity vulnerability in Siemens Sinec Network Management System with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Siemens Sinec Network Management System
Published: 2021-09-14
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP1). The web interface of affected devices is vulnerable to a Cross-Site Request Forgery (CSRF) attack. This could allow an attacker to manipulate the SINEC NMS configuration by tricking an unsuspecting user with administrative privileges to click on a malicious link.

Frequently asked questions

What is CVE-2021-37201?: A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP1). The web interface of affected devices is vulnerable to a Cross-Site Request Forgery (CSRF) attack. This could allow an attacker to manipulate the SINEC NMS configuration by tricking an unsuspecting user with administrative privileges to click on a malicious link.
How severe is CVE-2021-37201?: CVE-2021-37201 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-37201 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37201?: CVE-2021-37201 primarily affects Siemens Sinec Network Management System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37201?: 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-2021-37201 published?: CVE-2021-37201 was published on 2021-09-14 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-330339.pdf

Affected products (2)

cpe:2.3:a:siemens:sinec_network_management_system:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_network_management_system:1.0:-:*:*:*:*:*:*

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