What is CVE-2026-44041?

CVE-2026-44041 is a medium-severity vulnerability in Uvnc Ultravnc, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-07-01.

How severe is CVE-2026-44041?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Out-of-bounds Read in Uvnc Ultravnc

CVE-2026-44041

UltraVNC through 1.8.2.2 contains an out-of-bounds read in the wide-string to multibyte conversion helper. In rfb/dh.cpp:204, the vncWc2Mb() function passes a caller-supplied WCHAR pointer to wcslen() before any bounds check. If the caller…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Uvnc Ultravnc — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

33c584b5-0579-4c06-b2a0-8d8329fcab9c (vendor-advisory)
33c584b5-0579-4c06-b2a0-8d8329fcab9c (product)

Frequently asked questions

What is CVE-2026-44041?: CVE-2026-44041 is a medium-severity vulnerability in Uvnc Ultravnc, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-07-01.
How severe is CVE-2026-44041?: Medium severity. CVSS v3 base score is 4.3 out of 10.