vulnerability / NVI-00000859 / Revision 6
Argument Injection in PHP-CGI
Some Windows PHP-CGI deployments can interpret specially encoded request data as PHP options. The publisher reports possible code execution or source disclosure. The deployed PHP release, CGI invocation and Windows codepage all matter.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
A request-parsing boundary can affect how PHP is invoked. Check the published affected releases and configuration prerequisites, then use current vendor guidance and verify the deployed change. The presence of a vulnerable version is not evidence that exploitation occurred.
9.8 CRITICAL (3.1)
php severity and vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; not a measure of customer compromise.
Listed
CISA lists known exploitation. This does not establish exploitation of your system.
As of · CISA
9.8 CRITICAL (3.1)
security@php.net severity; no combined Null risk score.
9.8 CRITICAL (3.1)
nvd@nist.gov severity; no combined Null risk score.
99.987%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.99984. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
PHP
source listed8.1.* to <8.1.298.2.* to <8.2.208.3.* to <8.3.8
The CNA describes Apache invoking PHP-CGI on Windows with certain codepages and Best-Fit character conversion. Confirm all these conditions on the deployed service. This report cannot infer the operating system, web-server invocation or codepage from a package version alone.
PHP Group PHP
source listedThe linked source does not supply a complete affected-version range here.
CISA does not supply a complete application-specific affected range here. Follow the linked vendor advisory for version and configuration prerequisites.
03 / Response
What to do next
- vendor patch
The CNA lists historical first-fixed boundaries 8.1.29, 8.2.20, 8.3.8. Select a currently supported vendor release and verify the affected configuration.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. CVE Program / attributed CNA and ADP
- investigate
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. CISA
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
Optional / stays in this browser
Which conditions are worth checking?
This is a preliminary orientation to this advisory. It does not inspect anything, issue a finding, verify a fix or establish that a system is safe. Answers are neither submitted nor saved.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- CISA catalog date-added and due-date fields are not the original vulnerability disclosure date or universal legal deadlines.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- CVE-2024-4577 ↗
CVE Program / attributed CNA and ADP · cna record
Observed . CVE content: copyright The MITRE Corporation; CVE Terms of Use and license apply. CNA and ADP publishers retain separate attribution.
- CVE-2024-4577 ↗
CISA · official catalog
Observed . CISA KEV; CC0 1.0. Catalog assertions are not evidence of customer compromise.
- CVE-2024-4577 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2024-4577 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 6 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 3 ·
Source facts changed; compare the preserved prior revision.