CVE-2007-4991

NONECVSS 0.0Trending — 3 sources updated this weekElevated

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 97.8%
KEV: Not listed

Published

September 21, 2007

Last Modified

April 23, 2026

References (10)

cve@mitrehttp://osvdb.org/45906
cve@mitrehttp://www.securityfocus.com/bid/25753
cve@mitrehttp://www.securitytracker.com/id?1018727
cve@mitrehttp://www.zerodayinitiative.com/advisories/ZDI-07-053.html
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/36715
af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/45906
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/25753
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id?1018727
af854a3a-2127-422b-91ae-364da2661108http://www.zerodayinitiative.com/advisories/ZDI-07-053.html
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/36715

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Data Freshness Timeline

(refreshed 12× 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.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:51 UTCEG score recompute
2026-05-31 00:51 UTCGHSA enrichment
2026-05-31 00:13 UTCepss_batch
2026-05-31 00:13 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch

Frequently asked(4)

What is CVE-2007-4991?

CVE-2007-4991 is a none vulnerability published on September 21, 2007. 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.

When was CVE-2007-4991 disclosed?

CVE-2007-4991 was first published in the National Vulnerability Database on September 21, 2007, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2007-4991 actively exploited?

CVE-2007-4991 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2007-4991?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-4991, 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-2007-4991

📅 Published

🔄 Last Modified

🔗 References (10)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2007-4991?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (10)

Frequently asked(4)

Related CVEs(same CWE)