VULNERABILITY INTELLIGENCE

CVE-2023-43826

CVSS score7.5 HIGH

EPSS probability0.89%

CISA KEVNot currently listed

Published2023-12-19

Last modified2026-06-17

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

Description

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.

Weakness classification

security@apache.org: CWE-190

Primary references

security@apache.org — Mailing List, Third Party Advisory
security@apache.org — Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Vendor Advisory