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CVE-2021-26259

26
FAUCET Score

CVE-2021-26259 is a heap buffer overflow vulnerability in htmldoc version 1.9.12, specifically within the render_table_row() function in ps-pdf.cxx. This flaw carries a high CVSS score of 7.8, indicating a significant risk of arbitrary code execution and denial of service, requiring user interaction for exploitation. While the vulnerability has a high potential impact, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.9.12CPE matchmatch criteria
cpe:2.3:a:htmldoc_project:htmldoc:1.9.12:*:*:*:*:*:*:*

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
1.21%
Probability of exploitation in next 30 days
EPSS Percentile
65.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0121 is in the 63rd percentile among its peer group of 11,617 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / michaelrsweet/htmldoc/commit/0ddab26a542c74770317b622e985c52430092ba5
PatchThird Party Advisory
github.com / michaelrsweet/htmldoc/issues/417
ExploitIssue TrackingPatchThird Party Advisory