How severe is CVE-2009-3663?

CVE-2009-3663 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-3663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3663?

CVE-2009-3663 affects Jasper Httpdx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-3663 published?

CVE-2009-3663 was published on 2009-10-11 and last updated on 2026-06-16.

CVE-2009-3663

CVE-2009-3663 is a critical-severity vulnerability in Jasper Httpdx with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-134.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-134
Affected product: Jasper Httpdx
Published: 2009-10-11
Last modified: 2026-06-16

Description

Format string vulnerability in the h_readrequest function in http.c in httpdx Web Server 1.4 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via format string specifiers in the Host header.

Frequently asked questions

What is CVE-2009-3663?: Format string vulnerability in the h_readrequest function in http.c in httpdx Web Server 1.4 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via format string specifiers in the Host header.
How severe is CVE-2009-3663?: CVE-2009-3663 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-3663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3663?: CVE-2009-3663 affects Jasper Httpdx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-3663 published?: CVE-2009-3663 was published on 2009-10-11 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:jasper:httpdx:1.4:*:*:*:*:*:*:*

More vulnerabilities in Jasper Httpdx

CVE-2009-3711 — Critical (CVSS 10.0): Stack-based buffer overflow in the h_handlepeer function in http.cpp in httpdx 1.4, and possibly 1.4.3, allows remote…
CVE-2009-4769 — Critical (CVSS 9.3): Multiple format string vulnerabilities in the tolog function in httpdx 1.4, 1.4.5, 1.4.6, 1.4.6b, and 1.5 allow (1)…
CVE-2009-4770 — High (CVSS 7.5): The FTP server component in httpdx 1.4, 1.4.5, 1.4.6, 1.4.6b, and 1.5 has a default password of pass123 for the…
CVE-2009-4531 — Medium (CVSS 5.0): httpdx 1.4.4 and earlier allows remote attackers to obtain the source code for a web page by appending a . (dot)…

All CVEs affecting Jasper Httpdx →

Other CWE-134 vulnerabilities

CVE-2012-1851 — Critical (CVSS 10.0): Format string vulnerability in the Print Spooler service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2,…
CVE-2012-0242 — Critical (CVSS 10.0): Format string vulnerability in Advantech/BroadWin WebAccess before 7.0 allows remote attackers to execute arbitrary…
CVE-2011-2475 — Critical (CVSS 10.0): Format string vulnerability in ECTrace.dll in the iMailGateway service in the Internet Mail Gateway in OneBridge Server…
CVE-2011-1568 — Critical (CVSS 10.0): Format string vulnerability in the logText function in shmemmgr9.dll in IGSSdataServer.exe 9.00.00.11074, and…
CVE-2010-4235 — Critical (CVSS 10.0): Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server…
CVE-2011-0270 — Critical (CVSS 10.0): Format string vulnerability in nnmRptConfig.exe in HP OpenView Network Node Manager (OV NNM) 7.51 and 7.53 allows…

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