Cyber Resilience

CVE-2026-42000

MediumRCE

Published: 21 May 2026

Published
21 May 2026
Modified
26 May 2026
KEV Added
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Patch
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CVSS Score v3.1 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS Score 0.0024 15.3th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-42000 is a medium-severity Command Injection (CWE-77) vulnerability in Powerdns Authoritative. Its CVSS base score is 6.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 15.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Insufficient Validation of Names During AXFR

CWE(s)
CWE-77

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

CWE-77 command injection in public DNS AXFR service directly enables exploitation of a public-facing application.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

powerdns
authoritative
≤ 4.9.15 · 5.0.0 — 5.0.5

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References