CVE-1999-0770

NONECVSS 0.0Weaponized

0.0

Firewall-1 sets a long timeout for connections that begin with ACK or other packets except SYN, allowing an attacker to conduct a denial of service via a large number of connection attempts to unresponsive systems.

CVSS v3: —
EG Score: —
EPSS: 70.5%
KEV: Not listed

Published

July 29, 1999

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://www.osvdb.org/1027
cve@mitrehttp://www.securityfocus.com/bid/549
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/1027
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/549

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.

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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-19436✓ verified
First seen Jul 29, 1999
Check Point Software Firewall-1 3.0/1 4.0 - Table Saturation Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-1999-0770?

CVE-1999-0770 is a none vulnerability published on July 29, 1999. Firewall-1 sets a long timeout for connections that begin with ACK or other packets except SYN, allowing an attacker to conduct a denial of service via a large number of connection attempts to unresponsive systems.

When was CVE-1999-0770 disclosed?

CVE-1999-0770 was first published in the National Vulnerability Database on July 29, 1999, 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-1999-0770 actively exploited?

CVE-1999-0770 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0770?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0770, 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-1999-0770

📅 Published

🔄 Last Modified

🔗 References (4)