Unspecified vulnerability in Skype allows remote attackers to cause a denial of service (server hang) via unknown vectors related to sending long URIs, as claimed to be actively exploited on 20070817 using a "call to a specific number." NOTE: this identifier is for the en.securitylab.ru disclosure. According to the vendor, this issue is separate from the "sign-on issues" that reduced Skype service on 20070817, which appears to be a site-specific problem. As of 20070821, it is not clear whether this issue is simply a symptom of the larger sign-on problem.
CVE-2007-4429
NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 2%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 80.4%
- KEV
- Not listed
Published
August 20, 2007
Last Modified
April 23, 2026
References (22)
- cve@mitrehttp://blogs.csoonline.com/the_skype_mystery_why_blame_the_august_windows_updates
- cve@mitrehttp://en.securitylab.ru/poc/301420.php
- cve@mitrehttp://en.securitylab.ru/poc/extra/301419.php
- cve@mitrehttp://heartbeat.skype.com/2007/08/what_happened_on_august_16.html
- cve@mitrehttp://heartbeat.skype.com/2007/08/where_we_are_at_1100_gmt.html
- cve@mitrehttp://securityreason.com/securityalert/3032
- cve@mitrehttp://www.securityfocus.com/archive/1/476942/100/0/threaded
- cve@mitrehttp://www.securityfocus.com/archive/1/477156/100/0/threaded
- cve@mitrehttp://www.securityfocus.com/archive/1/477178/100/0/threaded
- cve@mitrehttp://www.securityfocus.com/archive/1/477240/100/0/threaded
- cve@mitrehttp://www.securitylab.ru/news/301422.php
- af854a3a-2127-422b-91ae-364da2661108http://blogs.csoonline.com/the_skype_mystery_why_blame_the_august_windows_updates
- af854a3a-2127-422b-91ae-364da2661108http://en.securitylab.ru/poc/301420.php
- af854a3a-2127-422b-91ae-364da2661108http://en.securitylab.ru/poc/extra/301419.php
- af854a3a-2127-422b-91ae-364da2661108http://heartbeat.skype.com/2007/08/what_happened_on_august_16.html
Data Freshness Timeline
(refreshed 3× in last 7d / 33× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-13 06:07 UTCEPSS rescore
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Frequently asked(4)
What is CVE-2007-4429?
CVE-2007-4429 is a none vulnerability published on August 20, 2007. Unspecified vulnerability in Skype allows remote attackers to cause a denial of service (server hang) via unknown vectors related to sending long URIs, as claimed to be actively exploited on 20070817 using a "call to a specific number." NOTE: this identifier is for the en.securitylab.ru disclosure.…
When was CVE-2007-4429 disclosed?
CVE-2007-4429 was first published in the National Vulnerability Database on August 20, 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-2007-4429 actively exploited?
CVE-2007-4429 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2007-4429?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-4429, 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.
Dependency Blast Radius
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