Uvnc
Uvnc Ultravnc: vulnerabilidades y CVE
Uvnc Ultravnc tiene 37 vulnerabilidades publicadas, 14 de ellas en los últimos 12 meses. 17 son críticas y 0 figuran en el catálogo de explotación activa de CISA.
CVE37
Últimos 12 meses14
Críticas17
Explotadas activamente0
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Últimas vulnerabilidades
| CVE | Severidad | EPSS | Explotación activa | Publicada | Descripción |
|---|---|---|---|---|---|
| CVE-2026-7840 | Crítica (9.3) | 2.6% | — | 1 jul 2026 | UltraVNC repeater through 1.8.2.2 contains a global buffer overflow in its embedded HTTP administration server. The functions wi_senderr() and wi_replyhdr() in repeater/webgui/webutils.c write the caller-supplied HTTP… |
| CVE-2026-7839 | Crítica (9.1) | 0.66% | — | 1 jul 2026 | UltraVNC repeater through 1.8.2.2 initializes the HTTP administration server with a hardcoded default password. In repeater/webgui/settings.c:197, when settings2.txt is absent on first run the repeater writes the… |
| CVE-2026-7838 | Alta (8.7) | 1.9% | — | 1 jul 2026 | UltraVNC viewer through 1.8.2.2 contains an integer overflow leading to a heap buffer overflow in the RFB protocol failure-response parsing path. In vncviewer/ClientConnection.cpp, the 4-byte network-supplied reasonLen… |
| CVE-2026-7831 | Alta (7.6) | 0.74% | — | 1 jul 2026 | UltraVNC viewer through 1.8.2.2 contains an off-by-one stack buffer overflow in the RFB ServerInit message handler. In vncviewer/ClientConnection.cpp, when the server-supplied nameLength equals exactly 2024 the code… |
| CVE-2026-7830 | Alta (7.4) | 0.29% | — | 1 jul 2026 | UltraVNC through 1.8.2.2 uses inadequate cryptography in the MS-Logon II authentication scheme (rfbUltraVNC_MsLogonIIAuth). In rfb/dh.cpp the Diffie-Hellman key exchange is performed with parameters that fit in an… |
| CVE-2026-7829 | Alta (7.2) | 0.85% | — | 1 jul 2026 | 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… |
| CVE-2026-7828 | Media (5.3) | 1.4% | — | 1 jul 2026 | 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) +… |
| CVE-2026-44042 | Baja (3.7) | 0.49% | — | 1 jul 2026 | UltraVNC repeater through 1.8.2.2 contains an off-by-one error in the Base64 decode helper used for HTTP Basic authentication. In repeater/webgui/webutils.c:817, the wi_uudecode() function checks whether the input… |
| CVE-2026-44041 | Media (6.5) | 0.41% | — | 1 jul 2026 | 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… |
| CVE-2026-44040 | Media (6.5) | 0.40% | — | 1 jul 2026 | UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produce VNC authentication challenge bytes. In rfb/vncauth.c:119-129, the vncRandomBytes() function seeds libc rand() with time(0)… |
| CVE-2026-4962 | Media (6.4) | 0.19% | — | 27 mar 2026 | A security flaw has been discovered in UltraVNC up to 1.6.4.0. Affected by this issue is some unknown functionality in the library version.dll of the component Service. The manipulation results in uncontrolled search… |
| CVE-2026-3787 | Media (6.4) | 0.18% | — | 8 mar 2026 | A weakness has been identified in UltraVNC 1.6.4.0 on Windows. This affects an unknown function in the library cryptbase.dll of the component Windows Service. This manipulation causes uncontrolled search path. The… |
| CVE-2020-37133 | Media (6.7) | 0.52% | — | 5 feb 2026 | UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters… |
| CVE-2020-37132 | Media (6.7) | 0.24% | — | 5 feb 2026 | UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application. Attackers can paste an overly long 300-character string… |
| CVE-2022-24750 | Alta (7.8) | 0.27% | — | 10 mar 2022 | UltraVNC is a free and open source remote pc access software. A vulnerability has been found in versions prior to 1.3.8.0 in which the DSM plugin module, which allows a local authenticated user to achieve local… |
| CVE-2019-8280 | Crítica (9.8) | 4.2% | — | 8 mar 2019 | UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder, which can potentially result code execution. This attack appear to be exploitable via network connectivity. This… |
| CVE-2019-8277 | Alta (7.5) | 3.0% | — | 8 mar 2019 | UltraVNC revision 1211 contains multiple memory leaks (CWE-665) in VNC server code, which allows an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can… |
| CVE-2019-8276 | Alta (7.5) | 5.7% | — | 8 mar 2019 | UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file transfer request handler, which can result in Denial of Service (DoS). This attack appears to be exploitable via network… |
| CVE-2019-8275 | Crítica (9.8) | 4.0% | — | 8 mar 2019 | UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network… |
| CVE-2019-8274 | Crítica (9.8) | 8.3% | — | 8 mar 2019 | UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer offer handler, which can potentially in result code execution. This attack appears to be exploitable via network… |
| CVE-2019-8273 | Crítica (9.8) | 8.3% | — | 8 mar 2019 | UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer request handler, which can potentially result in code execution. This attack appears to be exploitable via network… |
| CVE-2019-8272 | Crítica (9.8) | 3.9% | — | 8 mar 2019 | UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities… |
| CVE-2019-8271 | Crítica (9.8) | 8.3% | — | 8 mar 2019 | UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network… |
| CVE-2019-8270 | Alta (7.5) | 1.9% | — | 8 mar 2019 | UltraVNC revision 1210 has out-of-bounds read vulnerability in VNC client code inside Ultra decoder, which results in a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity.… |
| CVE-2019-8269 | Alta (7.5) | 5.7% | — | 8 mar 2019 | UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside FileTransfer module, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network… |
| CVE-2019-8268 | Crítica (9.8) | 3.9% | — | 8 mar 2019 | UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears… |
| CVE-2019-8267 | Alta (7.5) | 1.9% | — | 8 mar 2019 | UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat module, which results in a denial of service (DoS) condition. This attack appears to be exploitable via network… |
| CVE-2019-8266 | Crítica (9.8) | 2.8% | — | 8 mar 2019 | UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution. This… |
| CVE-2019-8265 | Crítica (9.8) | 3.1% | — | 8 mar 2019 | UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of SETPIXELS macro in VNC client code, which can potentially result in code execution. This attack appears to be… |
| CVE-2019-8264 | Crítica (9.8) | 3.1% | — | 8 mar 2019 | UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside Ultra2 decoder, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This… |
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