Is CVE-2007-4991 in the CISA KEV catalog?

No. CVE-2007-4991 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-4991?

CVE-2007-4991 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2007-4991?

CVE-2007-4991 has an EPSS score of 16.15% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2007-4991

MEDIUMEPSS 97th pctl

5.0

CVSS v2

NVD

Description

The SOCKS4 Proxy in Microsoft Internet Security and Acceleration (ISA) Server 2004 SP1 and SP2 allows remote attackers to obtain potentially sensitive information (the destination IP address of another user's session) via an empty packet.

CWE-200Information Exposure

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

16.15%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://osvdb.org/45906
http://www.securityfocus.com/bid/25753
http://www.securitytracker.com/id?1018727
http://www.zerodayinitiative.com/advisories/ZDI-07-053.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/36715

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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.