CVE-2026-33593 | PowerDNS DNSdist up to 1.9.12/2.0.3 DNSCrypt divide by zero

VDB-358962 · CVE-2026-33593 · GCVE-0-2026-33593 POWERDNS DNSDIST UP TO 1.9.12/2.0.3 DNSCRYPT DIVIDE BY ZERO HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 0.74+ Summaryinfo A vulnerability, which was classified as problematic, was found in PowerDNS DNSdist up to 1.9.12/2.0.3. Affected is an unknown function of the component DNSCrypt. The manipulation results in divide by zero. This vulnerability is reported as CVE-2026-33593. The attack can be launched remotely. No exploit exists. You should upgrade the affected component. Detailsinfo A vulnerability was found in PowerDNS DNSdist up to 1.9.12/2.0.3. It has been classified as problematic. Affected is some unknown functionality of the component DNSCrypt. The manipulation with an unknown input leads to a divide by zero vulnerability. CWE is classifying the issue as CWE-369. The product divides a value by zero. This is going to have an impact on availability. CVE summarizes: A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query. The weakness was disclosed by Haruto Kimura. The advisory is available at dnsdist.org. This vulnerability is traded as CVE-2026-33593 since 03/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project. Upgrading to version 1.9.13 or 2.0.4 eliminates this vulnerability. Productinfo Type Domain Name Software Vendor PowerDNS Name DNSdist Version 1.9.0 1.9.1 1.9.2 1.9.3 1.9.4 1.9.5 1.9.6 1.9.7 1.9.8 1.9.9 1.9.10 1.9.11 1.9.12 2.0.0 2.0.1 2.0.2 2.0.3 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 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: Divide by zero CWE: CWE-369 / 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: DNSdist 1.9.13/2.0.4 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: dnsdist.org Researcher: Haruto Kimura Status: Confirmed CVE: CVE-2026-33593 (🔒) GCVE (CVE): GCVE-0-2026-33593 GCVE (VulDB): GCVE-100-358962 Entryinfo Created: 04/22/2026 17:29 Changes: 04/22/2026 17:29 (65) Complete: 🔍 Cache ID: 99:B77:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸