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I. Basic Information for CVE-2026-33601
Vulnerability Information

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Vulnerability Title
Insufficient validation of zonemd record
Source: NVD (National Vulnerability Database)
Vulnerability Description
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
PowerDNS Recursor(pdns_recursor) 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerDNS Recursor(pdns_recursor)是荷兰PowerDNS公司的一款域名解析服务器。 PowerDNS Recursor存在代码问题漏洞,该漏洞源于使用zoneToCache函数时,攻击者可以发送导致空指针取消引用的区域,原因是缺少一致性检查,可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
PowerDNSRecursor 5.4.0 ~ 5.4.1 -
II. Public POCs for CVE-2026-33601
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III. Intelligence Information for CVE-2026-33601
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IV. Related Vulnerabilities
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