How severe is CVE-2021-43937?

CVE-2021-43937 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2021-43937 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43937?

CVE-2021-43937 affects Smartptt Scada Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43937?

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-2021-43937 published?

CVE-2021-43937 was published on 2022-04-29 and last updated on 2026-06-17.

CVE-2021-43937

CVE-2021-43937 is a high-severity vulnerability in Smartptt Scada Server with a CVSS 3.x base score of 7.6. 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 7.6)
CVSS v2: 6.8
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Smartptt Scada Server
Published: 2022-04-29
Last modified: 2026-06-17

Description

Elcomplus SmartPTT SCADA Server web application does not, or cannot, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Frequently asked questions

What is CVE-2021-43937?: Elcomplus SmartPTT SCADA Server web application does not, or cannot, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
How severe is CVE-2021-43937?: CVE-2021-43937 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2021-43937 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43937?: CVE-2021-43937 affects Smartptt Scada Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43937?: 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-2021-43937 published?: CVE-2021-43937 was published on 2022-04-29 and last updated on 2026-06-17.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-22-109-05

Affected products (1)

cpe:2.3:a:smartptt:scada_server:1.4:*:*:*:*:*:*:*

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