Is CVE-2009-0077 in the CISA KEV catalog?

No. CVE-2009-0077 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0077?

CVE-2009-0077 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2009-0077?

CVE-2009-0077 has an EPSS score of 78.50% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2009-0077

MEDIUMEPSS 100th pctl

5.0

CVSS v2

NVD

Description

The firewall engine in Microsoft Forefront Threat Management Gateway, Medium Business Edition (TMG MBE); and Internet Security and Acceleration (ISA) Server 2004 SP3, 2006, 2006 Supportability Update, and 2006 SP1; does not properly manage the session state of web listeners, which allows remote attackers to cause a denial of service (many stale sessions) via crafted packets, aka "Web Proxy TCP State Limited Denial of Service Vulnerability."

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

78.50%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.