CVE-2020-36938

Name: CVE-2020-36938
Creator: NVD / NIST
Published: 2026-01-27T16:16:09.663+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2020-36938 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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 estimates a 0.20% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.20%

9.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

References

Timeline

Published: Jan 27, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2020-36938?

How severe is CVE-2020-36938?

CVE-2020-36938 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36938?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36938?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST