UpHeron
All vulnerabilities

Servers and applications

CVE-2019-16866

Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule.

Severity
High 7.5
Published
3 Oct 2019
Last changed
8 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.9.4
Exploit chance
3.5% in the next 30 daysHigher than 89% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
UnboundServers and applications · cpe:a:nlnetlabs:unbound
  • Every version before 1.9.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-16866
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-16866