CVE-2026-25791

{"id": "CVE-2026-25791", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-02-09T21:15:49.650", "references": [{"url": "https://github.com/BishopFox/sliver/releases/tag/v1.7.0", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-400"}]}], "descriptions": [{"lang": "en", "value": "Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0."}, {"lang": "es", "value": "Sliver es un framework de comando y control que utiliza un netstack Wireguard personalizado. Antes de la versi\u00f3n 1.7.0, el oyente DNS C2 acepta mensajes de arranque TOTP no autenticados y asigna sesiones DNS del lado del servidor sin validar los valores OTP, incluso cuando EnforceOTP est\u00e1 habilitado. Dado que las sesiones se almacenan sin una ruta de limpieza/caducidad en este flujo, un actor remoto no autenticado puede crear sesiones repetidamente y provocar el agotamiento de la memoria. Esta vulnerabilidad se corrige en la versi\u00f3n 1.7.0."}], "lastModified": "2026-02-23T17:42:31.743", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7BD4DFA2-8C16-4122-A4D8-C3E03081913D", "versionEndExcluding": "1.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}