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.

CVSS v4.0

7.0 HIGHCVSS: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

CVSS v3.1

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

EPSS

0.21% chance of exploitation in the next 30 days, 11th percentile

Published

2026-01-27

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49379

References

• CVE Record
• NVD entry

Related

• CVE-2020-36937
• CVE-2020-36939
• CVE-2020-36936
• CVE-2020-36940
• CVE-2020-36935
• CVE-2020-36941