CVE-2026-7503: Remote Buffer Overflow in code-projects Plugin
The National Vulnerability Database (NVD) has detailed CVE-2026-7503, a critical buffer overflow vulnerability impacting code-projects Plugin 4.1.2cu.5137. The flaw resides within the setWiFiMultipleConfig function in the /lib/cste_modules/wireless.so library, accessed via /cgi-bin/cstecgi.cgi. Attackers can trigger this vulnerability by manipulating the wepkey2 argument, leading to a remote buffer overflow.
This isn’t a theoretical issue; the exploit for CVE-2026-7503 is publicly available. A CVSSv3.1 score of 8.8 (High) reflects the severity: it’s remotely exploitable without user interaction or elevated privileges, allowing for high impact on confidentiality, integrity, and availability. The attacker’s calculus here is straightforward: leverage a public exploit against unpatched systems for full system compromise, data exfiltration, or denial of service.
While specific affected products beyond the plugin version are not detailed by the NVD, the nature of a remote buffer overflow in a web-exposed component means any organization running this specific plugin version is directly exposed. Defenders must assume this vulnerability is actively being scanned for and exploited in the wild given the public exploit. Prioritization for patching and mitigation is non-negotiable.
What This Means For You
- If your organization utilizes code-projects Plugin 4.1.2cu.5137, you are directly exposed to CVE-2026-7503. This is a critical remote buffer overflow with a public exploit. Immediately identify all instances of this plugin, audit their versions, and prepare for urgent patching or isolation. This isn't a future threat; it's an active risk that demands immediate attention.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-7503: Remote Buffer Overflow in code-projects cstecgi.cgi setWiFiMultipleConfig
title: CVE-2026-7503: Remote Buffer Overflow in code-projects cstecgi.cgi setWiFiMultipleConfig
id: scw-2026-04-30-ai-1
status: experimental
level: critical
description: |
This rule detects attempts to exploit CVE-2026-7503 by identifying requests targeting the cstecgi.cgi script with the setWiFiMultipleConfig function and the vulnerable wepkey2 parameter. This indicates a potential remote buffer overflow attack.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7503/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/cgi-bin/cstecgi.cgi'
cs-uri-query|contains:
- 'setWiFiMultipleConfig'
cs-uri-query|contains:
- 'wepkey2='
selection_base:
cs-uri|contains:
- '/cgi-bin/cstecgi.cgi'
selection_indicators:
cs-uri-query|contains:
- 'setWiFiMultipleConfig'
cs-uri-query|contains:
- 'wepkey2='
condition: selection_base AND selection_indicators
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7503 | Buffer Overflow | code-projects Plugin 4.1.2cu.5137 |
| CVE-2026-7503 | Buffer Overflow | Vulnerable function: setWiFiMultipleConfig in /lib/cste_modules/wireless.so |
| CVE-2026-7503 | Buffer Overflow | Vulnerable file: /cgi-bin/cstecgi.cgi |
| CVE-2026-7503 | Buffer Overflow | Vulnerable argument: wepkey2 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 01:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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