How severe is CVE-2019-6442?

CVE-2019-6442 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-6442 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6442?

CVE-2019-6442 affects Ntpsec. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-6442?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-6442 published?

CVE-2019-6442 was published on 2019-01-16 and last updated on 2026-06-17.

CVE-2019-6442

CVE-2019-6442 is a medium-severity vulnerability in Ntpsec with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ntpsec
Published: 2019-01-16
Last modified: 2026-06-17

Description

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.

Frequently asked questions

What is CVE-2019-6442?: An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.
How severe is CVE-2019-6442?: CVE-2019-6442 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-6442 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6442?: CVE-2019-6442 affects Ntpsec. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-6442?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-6442 published?: CVE-2019-6442 was published on 2019-01-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ntpsec:ntpsec:*:*:*:*:*:*:*:*

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