CVE-2020-27799

7.8 highEPSS 0.3%

High (7.8) in upx upx. EPSS 0.3% chance of exploitation in the next 30 days.

A heap-based buffer over-read was discovered in the acc_ua_get_be32 function in miniacc.h in UPX 4.0.0 via a crafted Mach-O file.

Severity

7.8 high

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
CWEs: CWE-125, CWE-119
Published: 2022-08-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19