CVE-2026-40210

MEDIUM 4.8

Out-of-bounds read in SetMacAddrAction

CVSS Score

4.8

EPSS Score

0.0%

EPSS Percentile

0th

An out-of-bounds read might happen when SetMacAddrAction is used, potentially resulting in uninitialized memory being sent over the network or a crash.

Vendor	powerdns
Product	dnsdist
Published	Jun 25, 2026
Last Updated	Jun 25, 2026

Stay Ahead of the Next One

Get instant alerts for powerdns dnsdist

Be the first to know when new medium vulnerabilities affecting powerdns dnsdist are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Affected Versions

PowerDNS / DNSdist

1.9.0 < 1.9.15 2.0.0 < 2.0.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

dnsdist.org: https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html

Credits

Qifan Zhang (Palo Alto Networks)