CVE-2026-33593
CVE-2026-33593 is a high-severity vulnerability in Powerdns Dnsdist with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-369.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 0% (30th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-24929
- Weakness: CWE-369
- Affected product: Powerdns Dnsdist
- Published:
- Last modified:
Description
A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
Frequently asked questions
- What is CVE-2026-33593?
- A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
- How severe is CVE-2026-33593?
- CVE-2026-33593 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-33593 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-33593?
- CVE-2026-33593 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-33593?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-33593 have an EU (EUVD) identifier?
- Yes. CVE-2026-33593 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24929.
- When was CVE-2026-33593 published?
- CVE-2026-33593 was published on 2026-04-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*
More vulnerabilities in Powerdns Dnsdist
- CVE-2017-7557 — High (CVSS 8.8): dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack.
- CVE-2026-33602 — Medium (CVSS 6.5): A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value,…
- CVE-2026-24029 — Medium (CVSS 6.5): When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend…
- CVE-2026-27853 — Medium (CVSS 5.9): An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the…
- CVE-2018-14663 — Medium (CVSS 5.9): An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing…
- CVE-2016-7069 — Medium (CVSS 5.9): An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a…
All CVEs affecting Powerdns Dnsdist →
Other CWE-369 (Divide By Zero) vulnerabilities
- CVE-2021-32494 — Critical (CVSS 10.0): Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create…
- CVE-2017-11720 — Critical (CVSS 9.8): There is a division-by-zero vulnerability in LAME 3.99.5, caused by a malformed input file.
- CVE-2020-20892 — High (CVSS 8.8): An issue was discovered in function filter_frame in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, allows attackers…
- CVE-2025-4637 — High (CVSS 8.7): Divide By Zero vulnerability in davisking dlib allows remote attackers to cause a denial of service via a crafted…
- CVE-2026-37232 — High (CVSS 8.6): An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization…
- CVE-2024-26945 — High (CVSS 8.4): In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If…