Is CVE-2009-4535 being actively exploited?

CVE-2009-4535 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-4535?

CVE-2009-4535 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2009-4535

MEDIUM · CVSS 5.0EPSS 6.7%EU EUVD

Mongoose 2.8.0 and earlier allows remote attackers to obtain the source code for a web page by appending a / (slash) character to the URI.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 6.7% (94th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-4501)
Published: December 31, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4501 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

valenok / mongoose

References

http://freetexthost.com/0lcsrgt3vw(Exploit, URL Repurposed)
http://pocoftheday.blogspot.com/2009/10/mongoose-web-server-v280-remote-source_22.html(Exploit)
http://secunia.com/advisories/36934(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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