Integer overflow in Uvnc Ultravnc
CVE-2026-7828
UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path. In repeater/webgui/settings.c:336, the win_log() function allocates list nodes via malloc(sizeof(struct LIST) + strlen(line)), where line is d…
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Uvnc Ultravnc — versions 0
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (vendor-advisory)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (product)
Frequently asked questions
- What is CVE-2026-7828?
- CVE-2026-7828 is a medium-severity vulnerability in Uvnc Ultravnc, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2026-07-01.
- How severe is CVE-2026-7828?
- Medium severity. CVSS v3 base score is 5.3 out of 10.