What is CVE-2026-32853?

CVE-2026-32853 is a high-severity vulnerability in Libvnc Libvncserver, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-03-24.

How severe is CVE-2026-32853?

High severity. CVSS v3 base score is 8.1 out of 10.

Out-of-bounds Read in Libvnc Libvncserver

CVE-2026-32853

LibVNCServer versions 0.9.15 and prior (fixed in commit 009008e) contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Atta…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (35.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Affected products

Libvnc Libvncserver — versions 0, 009008e2f4d5a54dd71f422070df3af7b3dbc931
Libvncserver_project Libvncserver

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Exploit, Vendor Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-32853?: CVE-2026-32853 is a high-severity vulnerability in Libvnc Libvncserver, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-03-24.
How severe is CVE-2026-32853?: High severity. CVSS v3 base score is 8.1 out of 10.