What is CVE-2026-7829?

CVE-2026-7829 is a high-severity vulnerability in Uvnc Ultravnc, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2026-07-01.

How severe is CVE-2026-7829?

High severity. CVSS v3 base score is 7.2 out of 10.

Buffer overflow in Uvnc Ultravnc

CVE-2026-7829

UltraVNC repeater through 1.8.2.2 contains a post-authentication out-of-bounds write in the allow/deny rule parser. In repeater/webgui/settings.c:225-272, after strncpy_s copies a rule token into temp1[rule1] (25-byte destination) or temp2…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Uvnc Ultravnc — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-7829?: CVE-2026-7829 is a high-severity vulnerability in Uvnc Ultravnc, classified under Out-of-bounds Write. CVSS score: 7.2/10. Published 2026-07-01.
How severe is CVE-2026-7829?: High severity. CVSS v3 base score is 7.2 out of 10.