CVE-2007-4840: n/a vulnerability

CVE-2007-4840: PHP 5.2.4 and earlier allows context-dependent attackers to cause a denial of service (application crash) v...

PHP 5.2.4 and earlier allows context-dependent attackers to cause a denial of service (application crash) via (1) a long string in the out_charset parameter to the iconv function; or a long string in the charset parameter to the (2) iconv_mime_decode_headers, (3) iconv_mime_decode, or (4) iconv_strlen function. NOTE: this might not be a vulnerability in most web server environments that support multiple threads, unless these issues can be demonstrated for code execution.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 15:08 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2007-4840 is an old PHP denial-of-service issue affecting PHP 5.2.4 and earlier. Certain iconv-related inputs can crash an application. The source notes this may not be a practical vulnerability in many multithreaded web server environments unless stronger impact is demonstrated. Exposure is most plausible in legacy systems still running PHP 5.2.4 or earlier and accepting user-influenced charset values into iconv-related functions. Modern supported PHP deployments are unlikely to be affected, but the bundle does not provide a complete product matrix. Treat this as a legacy exposure cleanup item. Prioritize business-critical or internet-facing PHP 5.2.4-and-earlier systems, but do not treat it as confirmed active exploitation based on the supplied sources. Mitigation focus: Inventory systems for PHP 5.2.4 or earlier.; Check SUSE, Gentoo, rPath, HP, or current vendor guidance for applicable updates.; Migrate legacy PHP applications to a supported PHP version..

Prepared: Jun 29, 2026, 03:38 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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CVE-2007-4840 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 12, 2007, 20:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
https://issues.rpath.com/browse/RPL-1943CVE reference · x_refsource_CONFIRM

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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