What is CVE-2021-3003?

CVE-2021-3003 is a medium-severity vulnerability in Agenziaentrate Desktop Telematico, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.3/10. Published 2021-05-10.

How severe is CVE-2021-3003?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Agenziaentrate Desktop Telematico

CVE-2021-3003

Agenzia delle Entrate Desktop Telematico 1.0.0 contacts the jws.agenziaentrate.it server over cleartext HTTP, which allows man-in-the-middle attackers to spoof product updates.

Published 2021-05-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Agenziaentrate Desktop Telematico — versions 1.0.0

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

telematici.agenziaentrate.gov.it/Main/Desktop.jsp (Vendor Advisory)
fibonhack.github.io/2021/desktop-telematico-mitm-to-rce (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3003?: CVE-2021-3003 is a medium-severity vulnerability in Agenziaentrate Desktop Telematico, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.3/10. Published 2021-05-10.
How severe is CVE-2021-3003?: Medium severity. CVSS v3 base score is 5.3 out of 10.