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Fencer Vulns
medium 6.8

CVE-2023-30576 json

Apache Guacamole: Use-after-free in handling of RDP audio input buffer

published 2023-06-07 3 y ago modified 2026-06-17 4 mo ago also BIT-guacamole-2023-30576 , BIT-guacamole-server-2023-30576 , EUVD-2023-34957

cvss
6.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami guacamole 1.5.2
  • bitnami guacamole-server 1.5.2
  • apache guacamole 1.5.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami guacamole
>=0.9.0, <1.5.2
1.5.2
bitnami guacamole-server
>=0.9.0, <1.5.2
1.5.2

Affected products

  • Apache Software Foundation Apache Guacamole
  • apache guacamole

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.