CVE-2006-3251

NONECVSS 0.0

0.0

Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 87.9%
KEV: Not listed

Published

June 27, 2006

Last Modified

April 16, 2026

References (18)

cve@mitrehttp://secunia.com/advisories/20800
cve@mitrehttp://secunia.com/advisories/20846
cve@mitrehttp://secunia.com/advisories/21146
cve@mitrehttp://www.debian.org/security/2006/dsa-1114
cve@mitrehttp://www.gentoo.org/security/en/glsa/glsa-200606-25.xml
cve@mitrehttp://www.hashcash.org/source/CHANGELOG
cve@mitrehttp://www.securityfocus.com/bid/18659
cve@mitrehttp://www.vupen.com/english/advisories/2006/2551
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/27422
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/20800
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/20846
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/21146
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2006/dsa-1114
af854a3a-2127-422b-91ae-364da2661108http://www.gentoo.org/security/en/glsa/glsa-200606-25.xml
af854a3a-2127-422b-91ae-364da2661108http://www.hashcash.org/source/CHANGELOG

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-119Buffer Operations Within Bounds (Buffer Overflow)

Data Freshness Timeline

(refreshed 7× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-15 17:44 UTCEPSS rescore
2026-06-14 23:13 UTCEPSS rescore
2026-06-13 22:56 UTCEPSS rescore
2026-06-12 23:08 UTCEPSS rescore
2026-06-11 13:55 UTCEPSS rescore
2026-06-10 22:14 UTCEPSS rescore
2026-06-10 13:17 UTCEPSS rescore
2026-06-07 15:21 UTCEPSS rescore
2026-06-06 13:44 UTCEPSS rescore
2026-06-06 13:44 UTCEPSS rescore
2026-06-05 22:43 UTCEPSS rescore
2026-06-05 06:07 UTCEPSS rescore
2026-06-05 06:07 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 07:57 UTCEG score recompute
2026-05-31 07:57 UTCGHSA enrichment
2026-05-31 00:13 UTCEPSS rescore
2026-05-31 00:13 UTCEPSS rescore

Show 20 more

2026-05-31 00:13 UTCEPSS rescore
2026-05-29 13:40 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 03:33 UTCOSV refresh
2026-05-27 13:37 UTCEPSS rescore
2026-05-27 13:37 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore
2026-05-26 07:16 UTCEPSS rescore
2026-05-26 07:16 UTCEPSS rescore
2026-05-24 16:42 UTCEPSS rescore
2026-05-22 21:15 UTCEPSS rescore
2026-05-22 21:15 UTCEPSS rescore
2026-05-21 22:38 UTCEPSS rescore
2026-05-20 22:36 UTCEPSS rescore
2026-05-20 22:36 UTCEPSS rescore
2026-05-20 11:20 UTCEPSS rescore
2026-05-20 11:20 UTCEPSS rescore
2026-05-18 21:29 UTCEPSS rescore

Frequently asked(4)

What is CVE-2006-3251?

CVE-2006-3251 is a none vulnerability published on June 27, 2006. Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.

When was CVE-2006-3251 disclosed?

CVE-2006-3251 was first published in the National Vulnerability Database on June 27, 2006, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2006-3251 actively exploited?

CVE-2006-3251 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2006-3251?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-3251, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2006-3251

Explore →

Is Your Infrastructure Affected by CVE-2006-3251?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2006-3251

📅 Published

🔄 Last Modified

🔗 References (18)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2006-3251?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (18)

Frequently asked(4)

Related CVEs(same CWE)