CVE-2019-20788
CVSS v3
9.8
CRITICAL
EPSS Score
2.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
Technical details
- Published
- 2020-04-23
Frequently asked questions
What is CVE-2019-20788?
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
Is CVE-2019-20788 actively exploited?
Active exploitation of CVE-2019-20788 has not been confirmed. Its EPSS score was 2.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-20788?
CVE-2019-20788 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2019-20788 affecting your environment?
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