CVE-2000-0339

NONECVSS 0.0Weaponized

0.0

ZoneAlarm 2.1.10 and earlier does not filter UDP packets with a source port of 67, which allows remote attackers to bypass the firewall rules.

CVSS v3: —
EG Score: —
EPSS: 87.5%
KEV: Not listed

Published

April 24, 2000

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://www.osvdb.org/1294
cve@mitrehttp://www.securityfocus.com/bid/1137
cve@mitrehttp://www.securityfocus.com/templates/archive.pike?list=1&msg=20000421044123.2353.qmail%40securityfocus.com
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/1294
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/1137
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/templates/archive.pike?list=1&msg=20000421044123.2353.qmail%40securityfocus.com

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

2026-05-29 13:40 UTCepss_batch
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-19871✓ verified
First seen Apr 24, 2000
Zone Labs ZoneAlarm 2.1 Personal Firewall - Port 67
Open source ↗

Frequently asked(4)

What is CVE-2000-0339?

CVE-2000-0339 is a none vulnerability published on April 24, 2000. ZoneAlarm 2.1.10 and earlier does not filter UDP packets with a source port of 67, which allows remote attackers to bypass the firewall rules.

When was CVE-2000-0339 disclosed?

CVE-2000-0339 was first published in the National Vulnerability Database on April 24, 2000, 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-2000-0339 actively exploited?

CVE-2000-0339 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2000-0339?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0339, 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.

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CVE-2000-0339

📅 Published

🔄 Last Modified

🔗 References (6)