GHSA-hpq9-2mqh-7fg9 · 严重度： medium — UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path....
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 derived from HTTP request URIs. If strlen(line) is sufficiently large, the addition overflows to a value smaller than sizeof(struct LIST), causing a heap allocation smaller than required. The subsequent strcpy of the full string into the undersized allocation produces a heap buffer overflow. In the current implementation this overflow is bounded by the HTTP receive buffer size (WI_RXBUFSIZE = 153600 bytes, well below SIZE_MAX on 32-bit builds), limiting practical exploitability to a partial heap write. A remote unauthenticated attacker can trigger the theoretical overflow path by sending a maximally-sized URI in an HTTP request to the repeater HTTP port.
结论预警: CVE-2026-7828 综合评估为中等风险（42.6/100）：CVSS 技术影响为中级，利用概率（EPSS 1.06%） 强制指令: 梳理受影响资产并纳入修补计划。
风险随态势动态变化；本站持续评估并同步更新本页展示内容。
EPSS 日更估计相对被利用可能性；百分位表示该 CVE 在已评分漏洞中的相对排名（越高表示相对更严重）。
| # | 日期 | 旧 EPSS 分数 | 新 EPSS 分数 | 变化（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-07-09 | 0.84% | 1.06% | +0.22% |
| 2 | 2026-07-01 | — | 0.84% | — |
完整 EPSS 历史 （共 2 条）
该 CVE 的 CVSS 指标。
| 底座分 | 版本 | 严重度 | 向量 | 可利用性 | 影响 | 分数来源 |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | 33c584b5-0579-4c06-b2a0-8d8329fcab9c |
GHSA-hpq9-2mqh-7fg9 · 严重度： medium — UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path....
| URL | 标签 |
|---|---|
| https://github.com/ultravnc/UltraVNC | Product |
| https://uvnc.com/ | Product Release Notes |
| https://www.securin.io/zero-days/cve-2026-7828-integer-overflow-win-log-malloc-ultravnc-repeater |