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CVE-2007-4783

16
FAUCET Score

CVE-2007-4783 describes a denial-of-service vulnerability in the iconv_substr function of PHP versions 5.2.4 and earlier. Attackers can trigger an application crash or temporary hang by providing excessively long strings in the charset or str parameters. With a CVSS score of 5.0, this vulnerability is considered medium severity, requiring no authentication and having a low attack complexity, but primarily resulting in availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion 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
3.63%
Probability of exploitation in next 30 days
EPSS Percentile
88.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0363 is in the 85th percentile among its peer group of 23,725 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-2007-4783

php crash in iconv_substr() function

References

osvdb.org / 38917
secunia.com / advisories/27102
secunia.com / advisories/27659
secunia.com / advisories/30040
securityreason.com / securityalert/3115
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/1/478637/100/0/threaded
securityfocus.com / archive/1/491693/100/0/threaded