CVE-2019-20805

MEDIUMNVD 5.55.5—

5.5

p_lx_elf.cpp in UPX before 3.96 has an integer overflow during unpacking via crafted values in a PT_DYNAMIC segment.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 52.3%
KEV: Not listed

Published

June 1, 2020

Last Modified

April 11, 2025

References (4)

cve@mitrehttps://github.com/upx/upx/commit/8be9da8280dfa69d5df4417d4d81bda1cab78010
cve@mitrehttps://github.com/upx/upx/issues/317
af854a3a-2127-422b-91ae-364da2661108https://github.com/upx/upx/commit/8be9da8280dfa69d5df4417d4d81bda1cab78010
af854a3a-2127-422b-91ae-364da2661108https://github.com/upx/upx/issues/317

Weakness Classification(1)

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

CWE-190Integer Overflow or Wraparound

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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.

2026-06-04 13:10 UTCepss_batch
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2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 03:10 UTCEG score recompute
2026-05-27 03:10 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2019-20805?

CVE-2019-20805 is a medium vulnerability published on June 1, 2020. plxelf.cpp in UPX before 3.96 has an integer overflow during unpacking via crafted values in a PT_DYNAMIC segment.

When was CVE-2019-20805 disclosed?

CVE-2019-20805 was first published in the National Vulnerability Database on June 1, 2020, 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-2019-20805 actively exploited?

CVE-2019-20805 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-20805?

CVE-2019-20805 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2019-20805?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-20805, 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

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CVE-2019-20805

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-20805?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)