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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (12.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Winavr — versions 20100110
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49379 (exploit)
- sourceforge.net/projects/winavr/ (product)
- www.vulncheck.com/advisories/winavr-version-insecure-folder-permissions (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.