CVE-2009-4086: n/a vulnerability

CVE-2009-4086: CRLF injection vulnerability in Xerver HTTP Server 4.31 and 4.32 allows remote attackers to inject arbitrar...

CRLF injection vulnerability in Xerver HTTP Server 4.31 and 4.32 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via certain byte sequences at the end of a URL. NOTE: some of these details are obtained from third party information.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 06:54 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2009-4086 affects Xerver HTTP Server 4.31 and 4.32. A remote attacker could manipulate URL byte sequences to inject HTTP headers, enabling HTTP response splitting. Business urgency is highest only where this legacy server is still exposed, especially internet-facing. Likely limited to organizations still running Xerver HTTP Server 4.31 or 4.32. Internet-facing deployments carry higher concern. The source bundle does not identify affected CPEs or broader product families. Treat as a legacy exposure cleanup item. Escalate if Xerver 4.31 or 4.32 is internet-facing or supports sensitive applications. No active exploitation is confirmed in the provided sources. Mitigation focus: Inventory for Xerver HTTP Server 4.31 and 4.32.; Check vendor or trusted archival guidance for fixed versions or configuration advice.; Remove, replace, or isolate unsupported legacy Xerver deployments..

Prepared: Jun 28, 2026, 13:20 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 27, 2009, 20:45 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
xerver-response-splitting(54356)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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