High 8.8Published Mar 27, 2017

CVE-2017-6458Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects ntp and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.

CVSS: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

ntp ntp ntp:ntp	before 4.2.8; from 4.3.0 before 4.3.94; 4.2.8; 4.2.8; 4.2.8; 4.2.8; 4.2.8; 4.2.8; and 17 more ranges	NVD
hpe hpux-ntp hpe:hpux-ntp	before c.4.2.8.4.0	NVD
apple mac_os_x apple:mac_os_x	from 10.8.0 before 10.13	NVD
siemens simatic_net_cp_443-1_opc_ua_firmware siemens:simatic_net_cp_443-1_opc_ua_firmware	all versions	NVD

References

References

http://packetstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.html
http://seclists.org/fulldisclosure/2017/Nov/7
http://seclists.org/fulldisclosure/2017/Sep/62
http://support.ntp.org/bin/view/Main/NtpBug3379	patch, vendor-advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu	vendor-advisory
http://www.securityfocus.com/archive/1/archive/1/540464/100/0/threaded
http://www.securityfocus.com/bid/97051	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1038123	third-party-advisory, vdb-entry
http://www.ubuntu.com/usn/USN-3349-1
https://bto.bluecoat.com/security-advisory/sa147
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The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.