AUGUST 4, 2026
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Case File

CVE-2020-13817

HIGH · CVSS 7.4 EPSS 4.07%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-06-04 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.4. It may be remotely exploitable. It may lead to a denial-of-service condition.

CVE
CVE-2020-13817
Severity
HIGH
CVSS
7.4
EPSS
4.07%

Original NVD Description

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

Related CVEs

Other vulnerabilities affecting the same vendor(s)