Back
CVE-2016-7426
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which…
High7.5EPSS 12.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.
Timeline
ID reserved
By mitre
- 4 months later
· 4 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 12.4% · top 3.8% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (11)
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-3707-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2017:0252 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://nwtime.org/ntp428p9_release/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- VU#633847 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- 1037354 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://bto.bluecoat.com/security-advisory/sa139 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://support.ntp.org/bin/view/Main/NtpBug3071 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FreeBSD-SA-16:39 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 94451 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-7426)Record last updated .