CVE-2026-44041

Katalog CVE

CVSS 6.5 · Medium EPSS 0,41%

Kerentanan Out-of-bounds Read pada uvnc ultravnc. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

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 provides a wide-character buffer that is not properly NUL-terminated, wcslen() reads past the end of the buffer until it encounters a NUL wchar, resulting in an out-of-bounds read. Under typical Win32 API usage this requires an abnormal caller contract. Impact is limited to a potential information disclosure from adjacent memory regions or a process crash (denial of service) if the over-read crosses a page boundary.

Rincian

Terbit di NVD

1 Juli 2026

Terakhir diubah

9 Juli 2026

Status NVD

Modified

CVSS 3.1

6.5 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-125: Out-of-bounds Read

EPSS (30 hari)

0,41% peluang dieksploitasi; lebih tinggi dari 33,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/ultravnc/UltraVNC product
• https://uvnc.com/ product · release notes
• https://www.securin.io/zero-days/cve-2026-44041-vncwc2mb-wcslen-before-bounds-check-ultravnc