CVE-2001-1421

NONECVSS 0.0

0.0

AOL Instant Messenger (AIM) 4.7 and earlier allows remote attackers to cause a denial of service (application crash) via a large number of different fonts followed by an HTML HR tag.

CVSS v3: —
EG Score: —
EPSS: 83.8%
KEV: Not listed

Published

October 6, 2001

Last Modified

April 16, 2026

References (12)

cve@mitrehttp://www.kb.cert.org/vuls/id/530299
cve@mitrehttp://www.kb.cert.org/vuls/id/JARL-569MD7
cve@mitrehttp://www.securityfocus.com/archive/1/218920
cve@mitrehttp://www.securityfocus.com/archive/1/247707
cve@mitrehttp://www.securityfocus.com/bid/3756
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/7757
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/530299
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/JARL-569MD7
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/218920
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/247707
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/3756
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/7757

Data Freshness Timeline

(refreshed 12× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(4)

What is CVE-2001-1421?

CVE-2001-1421 is a none vulnerability published on October 6, 2001. AOL Instant Messenger (AIM) 4.7 and earlier allows remote attackers to cause a denial of service (application crash) via a large number of different fonts followed by an HTML HR tag.

When was CVE-2001-1421 disclosed?

CVE-2001-1421 was first published in the National Vulnerability Database on October 6, 2001, 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-2001-1421 actively exploited?

CVE-2001-1421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2001-1421?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-1421, 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

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CVE-2001-1421

📅 Published

🔄 Last Modified

🔗 References (12)