Insufficient Validation of Names During AXFR in Open-Xchange

Publication date: 2026-05-21

Last updated on: 2026-05-26

Assigner: Open-Xchange

Description

Insufficient Validation of Names During AXFR

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-21

Last Modified

2026-05-26

Generated

2026-06-30

AI Q&A

2026-05-21

EPSS Evaluated

2026-06-29

NVD

CVE-2026-42000

EUVD

EUVD-2026-31261

Affected Vendors & Products

Vendor	Product	Version / Range
powerdns	authoritative	From 5.0.0 (inc) to 5.0.5 (exc)
powerdns	authoritative	to 4.9.15 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-77	The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability involves insufficient validation of names during the AXFR process. AXFR is a DNS zone transfer mechanism, and improper validation can lead to security issues.

Impact Analysis

The vulnerability can impact you by allowing an attacker to cause integrity issues, as indicated by the CVSS score showing high impact on integrity. This could lead to unauthorized modification or manipulation of DNS data during zone transfers.

Hi! I’m here to help you understand CVE-2026-42000. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70