CVE-2026-33261
MEDIUMCVSS 5.9/10EPSS 0.23%
Last modified
CVE-2026-33261 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.
Description
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Powerdns | Recursor | >= 5.2.0, < 5.2.9 |
| Powerdns | Recursor | >= 5.3.0, < 5.3.6 |
| Powerdns | Recursor | 5.4.0 |
References
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.htmlBroken Link, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-33261?
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
How severe is CVE-2026-33261?
CVE-2026-33261 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2026-33261?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-33261?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST