What is CVE-2021-43939?

CVE-2021-43939 is a high-severity vulnerability in Elcomplus Smartptt, classified under Improper Authorization. CVSS score: 8.8/10. Published 2022-04-28.

How severe is CVE-2021-43939?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Elcomplus Smartptt

CVE-2021-43939

Elcomplus SmartPTT is vulnerable when a low-authenticated user can access higher level administration authorization by issuing requests directly to the desired endpoints.

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Elcomplus Smartptt — versions 1.1
Smartptt Scada — versions 1.1

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

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

Frequently asked questions

What is CVE-2021-43939?: CVE-2021-43939 is a high-severity vulnerability in Elcomplus Smartptt, classified under Improper Authorization. CVSS score: 8.8/10. Published 2022-04-28.
How severe is CVE-2021-43939?: High severity. CVSS v3 base score is 8.8 out of 10.