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CVE-2026-7840

🗓️ 01 Jul 2026 03:33:28Reported by securinType 
cve
 cve
🔗 web.nvd.nist.gov👁 4 Views

UltraVNC repeater pre auth HTTP server overflow allows remote code execution via long URI.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-7840
1 Jul 202603:33
attackerkb
Cvelist
CVE-2026-7840 UltraVNC repeater HTTP server global buffer overflow via long URI (pre-auth RCE)
1 Jul 202603:33
cvelist
EUVD
EUVD-2026-40886
1 Jul 202603:33
euvd
NVD
CVE-2026-7840
1 Jul 202605:16
nvd
Positive Technologies
PT-2026-54490
1 Jul 202600:00
ptsecurity
[
  {
    "vendor": "uvnc",
    "product": "UltraVNC",
    "versions": [
      {
        "version": "0",
        "lessThanOrEqual": "1.8.2.2",
        "status": "affected",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "repeater"
    ]
  }
]

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01 Jul 2026 05:16Current
6.6Medium risk
Vulners AI Score6.6
CVSS 49.3
CVSS 3.19.8
SSVC
4