CVE-2020-27802

MEDIUMNVD 5.55.5—

5.5

An floating point exception was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 15.3%
KEV: Not listed

Published

August 25, 2022

Last Modified

April 11, 2025

References (2)

secalert@redhathttps://github.com/upx/upx/issues/393
af854a3a-2127-422b-91ae-364da2661108https://github.com/upx/upx/issues/393

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 16:30 UTCEG score recompute
2026-05-25 16:30 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2020-27802?

CVE-2020-27802 is a medium vulnerability published on August 25, 2022. An floating point exception was discovered in the elflookup function in plx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.

When was CVE-2020-27802 disclosed?

CVE-2020-27802 was first published in the National Vulnerability Database on August 25, 2022, with the most recent update on April 11, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-27802 actively exploited?

CVE-2020-27802 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-27802?

CVE-2020-27802 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2020-27802?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27802, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-27802

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CVE-2020-27802

📅 Published

🔄 Last Modified

🔗 References (2)