What is CVE-2020-12042?

CVE-2020-12042 is a medium-severity vulnerability in Opto22 Softpac Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2020-05-14.

How severe is CVE-2020-12042?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Opto22 Softpac Project

CVE-2020-12042

Opto 22 SoftPAC Project Version 9.6 and prior. Paths specified within the zip files used to update the SoftPAC firmware are not sanitized. As a result, an attacker with user privileges can gain arbitrary file write access with system access.

Published 2020-05-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Opto22 Softpac Project
Opto 22 Softpac Project — versions SoftPAC Project Version 9.6 and prior

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

www.us-cert.gov/ics/advisories/icsa-20-135-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2020-12042?: CVE-2020-12042 is a medium-severity vulnerability in Opto22 Softpac Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2020-05-14.
How severe is CVE-2020-12042?: Medium severity. CVSS v3 base score is 6.5 out of 10.