What is CVE-2023-30576?

CVE-2023-30576 is a medium-severity vulnerability in Apache Guacamole, classified under Use After Free. CVSS score: 6.8/10. Published 2023-06-07.

How severe is CVE-2023-30576?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Use After Free in Apache Guacamole

CVE-2023-30576

Apache Guacamole 0.9.10 through 1.5.1 may continue to reference a freed RDP audio input buffer. Depending on timing, this may allow an attacker to execute arbitrary code with the privileges of the guacd process.

Vulnerability class: Use-After-Free

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Apache Guacamole
Apache Software Foundation Guacamole — versions 0.9.10

Weakness classification (CWE)

CWE-416 — Use After Free

References

lists.apache.org/thread/vgtvxb3w7mm84hx6v8dfc0onsoz05gb6 (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2023-30576?: CVE-2023-30576 is a medium-severity vulnerability in Apache Guacamole, classified under Use After Free. CVSS score: 6.8/10. Published 2023-06-07.
How severe is CVE-2023-30576?: Medium severity. CVSS v3 base score is 6.8 out of 10.