CVE-2026-33600 | PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0 null pointer dereference

VDB-358841 · CVE-2026-33600 · GCVE-0-2026-33600 POWERDNS RECURSOR UP TO 5.2.8/5.3.5/5.4.0 NULL POINTER DEREFERENCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.2 $0-$5k 1.25+ Summaryinfo A vulnerability was found in PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0. It has been rated as problematic. Affected is an unknown function. The manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2026-33600. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability, which was classified as problematic, has been found in PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0. This issue affects an unknown function. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is: An RPZ sent by a malicious authoritative server can result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service. The weakness was released by ylwango613. The advisory is shared at docs.powerdns.com. The identification of this vulnerability is CVE-2026-33600 since 03/23/2026. The exploitation is known to be difficult. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. Upgrading to version 5.2.9, 5.3.6 or 5.4.1 eliminates this vulnerability. Productinfo Type Domain Name Software Vendor PowerDNS Name Recursor Version 5.0 5.1 5.2 5.2.0 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.6 5.2.7 5.2.8 5.3 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.4.0 License free CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 3.3 VulDB Meta Temp Score: 3.2 VulDB Base Score: 2.2 VulDB Temp Score: 2.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.4 CNA Vector: 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Null pointer dereference CWE: CWE-476 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Recursor 5.2.9/5.3.6/5.4.1 Timelineinfo 03/23/2026 CVE reserved 04/22/2026 +29 days Advisory disclosed 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Advisory: docs.powerdns.com Researcher: ylwango613 Status: Confirmed CVE: CVE-2026-33600 (🔒) GCVE (CVE): GCVE-0-2026-33600 GCVE (VulDB): GCVE-100-358841 Entryinfo Created: 04/22/2026 13:29 Changes: 04/22/2026 13:29 (64) Complete: 🔍 Cache ID: 99:F5D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸