{"cve":"CVE-2015-7855","nvd":{"published":"2017-08-07T20:29:00.950","modified":"2026-06-17T00:33:16.320","status":"Modified","description":"The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-20"],"references":["http://support.ntp.org/bin/view/Main/NtpBug2922","http://www.debian.org/security/2015/dsa-3388","http://www.securityfocus.com/bid/77283","http://www.securitytracker.com/id/1033951","https://bugzilla.redhat.com/show_bug.cgi?id=1274264"],"products":["debian:debian_linux","netapp:clustered_data_ontap","netapp:data_ontap","netapp:oncommand_balance","netapp:oncommand_performance_manager","netapp:oncommand_unified_manager","ntp:ntp","siemens:tim_4r-ie_dnp3_firmware","siemens:tim_4r-ie_firmware"],"source":"nvd","synced_at":"2026-10-19T20:44:47.710380879+00:00"},"epss":{"cve":"CVE-2015-7855","score":0.31068,"percentile":0.98264,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}