CVE-2023-27830
CVSS v3
9
CRITICAL
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.
Technical details
- Published
- 2023-04-12
Frequently asked questions
What is CVE-2023-27830?
TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.
Is CVE-2023-27830 actively exploited?
Active exploitation of CVE-2023-27830 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-27830?
CVE-2023-27830 has a CVSS v3 base score of 9 (CRITICAL severity).
Is CVE-2023-27830 affecting your environment?
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