When was CVE-2011-4528 disclosed?

CVE-2011-4528 was first published in the National Vulnerability Database on December 20, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-4528 actively exploited?

CVE-2011-4528 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2011-4528?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4528, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

CVE-2011-4528

NONENVD 0.0

0.0

Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.

CVSS v3: —
EG Score: —
EPSS: 86.6%
KEV: Not listed

References (14)

cret@certhttp://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
cret@certhttp://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
cret@certhttp://osvdb.org/77909
cret@certhttp://secunia.com/advisories/47326
cret@certhttp://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
cret@certhttp://www.debian.org/security/2011/dsa-2370
cret@certhttp://www.kb.cert.org/vuls/id/209659
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/77909
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/47326
af854a3a-2127-422b-91ae-364da2661108http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2011/dsa-2370
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/209659

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CVE-2011-4528

Published

Last Modified

References (14)

Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4528?

CVE-2011-4528

📅 Published

🔄 Last Modified

🔗 References (14)

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4528?

Published

Last Modified

References (14)

Frequently asked(4)