CVE-2023-43826

8.8 highEPSS 0.9%

High (8.8) in apache guacamole. EPSS 0.9% chance of exploitation in the next 30 days.

Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process. Users are recommended to upgrade to version 1.5.4, which fixes this issue.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2023-12-19
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apache:guacamole

References

http://www.openwall.com/lists/oss-security/2023/12/19/4
https://lists.apache.org/thread/23gzwftpfgtq97tj6ttmbclry53kmwv6
http://www.openwall.com/lists/oss-security/2023/12/19/4
https://lists.apache.org/thread/23gzwftpfgtq97tj6ttmbclry53kmwv6

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