What is CVE-2020-36938?

CVE-2020-36938 is a high-severity vulnerability in Winavr, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 8.8/10. Published 2026-01-27.

How severe is CVE-2020-36938?

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

Vulnerability in Winavr

CVE-2020-36938

WinAVR version 20100110 contains an insecure permissions vulnerability that allows authenticated users to modify system files and executables. Attackers can leverage the overly permissive access controls to potentially modify critical DLLs and executable files in the WinAVR installation directory.

EPSS: 0.002 (9.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Winavr — versions 20100110

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2020-36938?: CVE-2020-36938 is a high-severity vulnerability in Winavr, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 8.8/10. Published 2026-01-27.
How severe is CVE-2020-36938?: High severity. CVSS v3 base score is 8.8 out of 10.