Is CVE-2009-3627 in the CISA KEV catalog?

No. CVE-2009-3627 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-3627?

CVE-2009-3627 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2009-3627?

CVE-2009-3627 has an EPSS score of 1.73% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-3627?

Upgrade libhtml-parser-perl on debian 11 to 3.64-1 or later.

CVE & CISA-KEV Catalog

CVE-2009-3627

MEDIUMEPSS 75th pctl

4.3

CVSS v2

NVD

Description

The decode_entities function in util.c in HTML-Parser before 3.63 allows context-dependent attackers to cause a denial of service (infinite loop) via an incomplete SGML numeric character reference, which triggers generation of an invalid UTF-8 character.

CWE-20Improper Input Validation

How to fix

Remediation Available

libhtml-parser-perlDebian

Fixed in:3.64-1CVE-2009-3627

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

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.73%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Patch4

Vendor Advisory1

secunia.com

Other references3

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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 2026-04-23.