What’s Vulnerable › Vulnerabilities

CVE-2020-27801

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-08-25 · updated 2026-06-17
• Weakness: CWE-119

Description

A heap-based buffer over-read was discovered in the get_le64 function in bele.h in UPX 4.0.0 via a crafted Mach-O file.

Affected products

• upx: 4.0.0

References

• https://github.com/upx/upx/issues/394
• https://github.com/upx/upx/issues/394

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