CVE-2026-42000
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
Insufficient validation of names during AXFR (DNS zone transfer) may allow an attacker to inject malicious or malformed data.
Risk Assessment
An attacker could exploit this to perform unauthorized zone transfers, exposing sensitive domain information.
Recommendation
Update DNS software to a version that properly validates names during AXFR. Restrict zone transfer access to trusted secondary servers only.
Other vulnerabilities in DNS server
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A heap-based buffer overflow in DNS Server allows an unauthorized attacker to execute code over a network. The vulnerability stems from improper memory handling during DNS query processing.
- CVE-2026-83869Critical
Integer underflow (wrap or wraparound) in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2016-3227Critical
A use-after-free vulnerability in the DNS Server component in Microsoft Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted requests.
- CVE-2026-97844Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97843Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97842Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97841Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97840Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97839Medium
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
- CVE-2026-97838Medium
An out-of-bounds read vulnerability in the DNS Server allows an authorized attacker to disclose information over a network.
Original NVD description (English source)
Insufficient Validation of Names During AXFR
Vulnerability data from NVD (NIST) · CISA KEV · EPSS