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CVE-2019-19630

24
FAUCET Score

CVE-2019-19630 describes a stack-based buffer overflow vulnerability in HTMLDOC 1.9.7, specifically within the hd_strlcpy() function when processing crafted HTML documents. This flaw impacts various distributions of HTMLDOC, including those found in Debian and Fedora. Rated with a CVSS score of 7.8 (High), this vulnerability requires user interaction (UI:R) and local access (AV:L) to exploit, but can lead to high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). The attack complexity is low (AC:L), making it relatively easy to execute if an attacker gains local access and can entice a user to open a malicious file. Currently, there is no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit or ExploitDB. The vulnerability has received minimal community discussion and media coverage, suggesting it is not widely known or actively targeted.

Impacted Technologies

VendorProductVersion(s)CPE
1.9.7CPE matchmatch criteria
cpe:2.3:a:htmldoc_project:htmldoc:1.9.7:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
30CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 61st percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / michaelrsweet/htmldoc/issues/370
ExploitIssue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2019/12/msg00008.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/07/msg00000.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/7MZLVUBON5AYWYTFTJ4HBSHGTQTY7KBN
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/FEUT3LG6DWTICKXYAN4SWOQWWCGHPLDJ