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CVE-2011-4869

HIGH · CVSS 7.8EPSS 3.0%EU EUVD

validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.

Key facts

CVSS score
7.8 (v2.0)
Severity
HIGH
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness (CWE)
CWE-399
EPSS score
3.0% (87th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-4786)
Published
December 20, 2011
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4786 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

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References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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