CVE-2000-0553

NONECVSS 0.0

0.0

Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping "return-rst" and "keep state" rules, allows remote attackers to bypass access restrictions.

CVSS v3: —
EG Score: —
EPSS: 63.5%
KEV: Not listed

Published

May 26, 2000

Last Modified

April 16, 2026

References (8)

cve@mitrehttp://archives.neohapsis.com/archives/bugtraq/2000-05/0326.html
cve@mitrehttp://www.osvdb.org/1377
cve@mitrehttp://www.securityfocus.com/bid/1308
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/4994
af854a3a-2127-422b-91ae-364da2661108http://archives.neohapsis.com/archives/bugtraq/2000-05/0326.html
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/1377
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/1308
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/4994

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
2026-05-28 13:42 UTCepss_batch
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2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
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2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Frequently asked(4)

What is CVE-2000-0553?

CVE-2000-0553 is a none vulnerability published on May 26, 2000. Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping "return-rst" and "keep state" rules, allows remote attackers to bypass access restrictions.

When was CVE-2000-0553 disclosed?

CVE-2000-0553 was first published in the National Vulnerability Database on May 26, 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-2000-0553 actively exploited?

CVE-2000-0553 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2000-0553?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0553, 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-2000-0553

📅 Published

🔄 Last Modified

🔗 References (8)