System	Score	Found at
cvssv3	5.3	https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-16866.json
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
epss	0.01248	https://api.first.org/data/v1/epss?cve=CVE-2019-16866
cvssv2	5.0	https://nvd.nist.gov/vuln/detail/CVE-2019-16866
cvssv3.1	7.5	https://nvd.nist.gov/vuln/detail/CVE-2019-16866
archlinux	High	https://security.archlinux.org/AVG-1042

Reference id	Reference type	URL
		https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-16866.json
		https://api.first.org/data/v1/epss?cve=CVE-2019-16866
		https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16866
		https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog
		https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/
		https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/
		https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
		https://seclists.org/bugtraq/2019/Oct/23
		https://www.debian.org/security/2019/dsa-4544
1767955		https://bugzilla.redhat.com/show_bug.cgi?id=1767955
941692		https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941692
ASA-201910-6		https://security.archlinux.org/ASA-201910-6
AVG-1042		https://security.archlinux.org/AVG-1042
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*		https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*		https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
CVE-2019-16866		https://nvd.nist.gov/vuln/detail/CVE-2019-16866
USN-4149-1		https://usn.ubuntu.com/4149-1/

No exploits are available.

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-16866.json

Attack Vector (AV)	Attack Complexity (AC)	Privileges Required (PR)	User Interaction (UI)	Scope (S)	Confidentiality Impact (C)	Integrity Impact (I)	Availability Impact (A)
network adjacent_network local physical	low high	none low high	none required	unchanged changed	high low none	high low none	high low none

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-16866

Exploitability (E)	Access Vector (AV)	Access Complexity (AC)	Authentication (Au)	Confidentiality Impact (C)	Integrity Impact (I)	Availability Impact (A)
high functional unproven proof_of_concept not_defined	local adjacent_network network	high medium low	multiple single none	none partial complete	none partial complete	none partial complete

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-16866

Attack Vector (AV)	Attack Complexity (AC)	Privileges Required (PR)	User Interaction (UI)	Scope (S)	Confidentiality Impact (C)	Integrity Impact (I)	Availability Impact (A)
network adjacent_network local physical	low high	none low high	none required	unchanged changed	high low none	high low none	high low none

Percentile	0.79266
EPSS Score	0.01248
Published At	April 1, 2026, 12:55 p.m.

Date	Actor	Action	Source	VulnerableCode Version
2026-04-01T14:15:54.332377+00:00	RedHat Importer	Import	https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-16866.json	38.0.0