Is CVE-2020-36403 in the CISA KEV catalog?

No. CVE-2020-36403 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-36403?

CVE-2020-36403 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2020-36403?

CVE-2020-36403 has an EPSS score of 1.58% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-36403?

Upgrade htslib on debian 11 to 1.11-1 or later.

CVE & CISA-KEV Catalog

CVE-2020-36403

HIGHEPSS 73th pctl

8.8

CVSS v3

NVD

Description

HTSlib through 1.10.2 allows out-of-bounds write access in vcf_parse_format (called from vcf_parse and vcf_read).

CWE-787Out-of-bounds Write

How to fix

Remediation Available

htslibDebian

Fixed in:1.11-1CVE-2020-36403

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.58%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Patch2

Exploit1

github.com

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.