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Critical severity · published Apr 12, 2023
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
9.0
CVSS
1.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TI
Tightvnc · Tightvnc
before 2.8.75 · source: NVD
Affected product
TI
Tightvnc
Tightvnc
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-27830
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-27830
Exploit
https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce
Product
https://www.tightvnc.com/news.php
Product
https://www.tightvnc.com/whatsnew.php
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