CVE-2021-23158
CVSS v3
9.8
CRITICAL
EPSS Score
2.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A flaw was found in htmldoc in v1.9.12. Double-free in function pspdf_export(),in ps-pdf.cxx may result in a write-what-where condition, allowing an attacker to execute arbitrary code and denial of service.
Technical details
- Published
- 2022-03-16
Frequently asked questions
What is CVE-2021-23158?
A flaw was found in htmldoc in v1.9.12. Double-free in function pspdf_export(),in ps-pdf.cxx may result in a write-what-where condition, allowing an attacker to execute arbitrary code and denial of service.
Is CVE-2021-23158 actively exploited?
Active exploitation of CVE-2021-23158 has not been confirmed. Its EPSS score was 2.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-23158?
CVE-2021-23158 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-23158 affecting your environment?
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