What is CVE-2021-43934?

CVE-2021-43934 is a critical-severity vulnerability in Elcomplus Smartptt, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-04-28.

How severe is CVE-2021-43934?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Elcomplus Smartptt

CVE-2021-43934

Elcomplus SmartPTT is vulnerable as the backup and restore system does not adequately validate upload requests, enabling a malicious user to potentially upload arbitrary files.

Vulnerability class: Unrestricted File Upload

Published 2022-04-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000

Affected products

Elcomplus Smartptt — versions 1.1
Smartptt Scada — versions 1.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.cisa.gov/uscert/ics/advisories/icsa-22-109-04 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43934?: CVE-2021-43934 is a critical-severity vulnerability in Elcomplus Smartptt, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-04-28.
How severe is CVE-2021-43934?: Critical severity. CVSS v3 base score is 9.8 out of 10.