CVE-2026-44040
A remote, anonymous attacker can exploit multiple vulnerabilities in UltraVNC to execute arbitrary code, disclose confidential information, manipulate data, and cause a denial of service.
CSIRTS triage
- What
- A remote, anonymous attacker can exploit multiple vulnerabilities in UltraVNC to execute arbitrary code, disclose confidential information, manipulate data, and cause a denial of service.
- Who is affected
- Deployments of UltraVNC.
- Urgency
- Remediation is high urgency due to the severity of the vulnerabilities and potential impacts.
- Action
- Apply patches or updates as soon as they are available.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Advisory coverage (2)
- high[NEW] [high] UltraVNC: Multiple vulnerabilitiescert-bund · 2026-07-01
- mediumCVE-2026-44040: UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produ…nvd · 2026-07-01
External references
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[](https://www.csirts.com/cve/CVE-2026-44040)