Buffer overflow in PHP before 5.2.0 allows remote attackers to execute arbitrary code via crafted UTF-8 inputs to the (1) htmlentities or (2) htmlspecialchars functions.
Conclusion & alert: CVE-2006-5465 is rated Moderate Risk (57.8/100): CVSS High severity, with high exploitation likelihood (EPSS 7.51%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 41.88% | 7.51% | -34.37% |
| 2 | 2025-12-28 | 23.55% | 41.88% | +18.33% |
| 3 | 2025-12-27 | — | 23.55% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2006-5465: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. | https://security.alpinelinux.org/vuln/CVE-2006-5465 |
gentoo
|
high | CVE-2006-5465: 1 GLSA(s) (200703-21), 1 atom(s) (dev-lang/php); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-5465 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2006-5465 |
ubuntu
|
medium | CVE-2006-5465 medium priority: Ubuntu including 1 source packages (php5), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2006-5465 |
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| php | php | <= 5.1.6 | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* |
| php | php | 5.0 | cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:* |
| php | php | 5.0 | cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:* |
| php | php | 5.0 | cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:* |
| php | php | 5.0.0 | cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:* |
| php | php | 5.0.1 | cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:* |
| php | php | 5.0.2 | cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:* |
| php | php | 5.0.3 | cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:* |
| php | php | 5.0.4 | cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:* |
| php | php | 5.0.5 | cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:* |
| php | php | 5.1.0 | cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:* |
| php | php | 5.1.1 | cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:* |
| php | php | 5.1.2 | cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:* |
| php | php | 5.1.3 | cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:* |
| php | php | 5.1.4 | cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:* |
| php | php | 5.1.5 | cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:* |