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CVE-2007-4840

16
FAUCET Score

CVE-2007-4840 describes a denial-of-service vulnerability affecting PHP versions 5.2.4 and earlier. Attackers can trigger an application crash by supplying excessively long strings to the out_charset parameter of the iconv function, or the charset parameter of iconv_mime_decode_headers, iconv_mime_decode, or iconv_strlen functions. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and potential for partial availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.4CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.15%
Probability of exploitation in next 30 days
EPSS Percentile
86.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0315 is in the 81st percentile among its peer group of 23,703 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2007-4840

CVE-2007-4840

References

lists.opensuse.org / opensuse-security-announce/2008-01/msg00006.html
osvdb.org / 38916
secunia.com / advisories/27102
secunia.com / advisories/27659
secunia.com / advisories/28658
secunia.com / advisories/30040
securityreason.com / securityalert/3122
issues.rpath.com / browse/RPL-1943
wiki.rpath.com / wiki/Advisories:rPSA-2007-0242
gentoo.org / security/en/glsa/glsa-200710-02.xml
securityfocus.com / archive/1/478730/100/0/threaded
securityfocus.com / archive/1/491693/100/0/threaded