Summary
The Weidmueller security routers IE-SR-4TX and IE-SR-4GT in firmware releases prior to 2.3.4 bundle a PHP version that is affected by CVE-2026-109618. In the configuration used by the products, the vulnerability can allow an attacker to cause a denial of service by making the web interface temporarily unavailable. All other functions (Routing, Firewall etc.) are not affected. It is fixed in firmware 2.3.4. CVE-2026-109619, which was published together with CVE-2026-109618, does not affect the products.
Details
Impact
An unauthenticated remote attacker with network access to the web interface can make it temporarily unavailable. Confidentiality and integrity are not affected; only availability of the web interface is impacted.
Mitigation
Restrict access to the web interface to trusted networks.
Remediation
Update to version 2.3.4 or later.
| Product | Article Number | Firmware File Name | Affected Version | Fixed Version |
|---|---|---|---|---|
| IE-SR-4TX | 2751270000 | Firmware_IE-SR-4TX_series | <2.3.4 | 2.3.4 |
| IE-SR-4TX-LTE/4G-EU | 2751280000 | Firmware_IE-SR-4TX_series | <2.3.4 | 2.3.4 |
| IE-SR-4TX-LTE/4G-USEMEA | 2739630000 | Firmware_IE-SR-4TX_series | <2.3.4 | 2.3.4 |
| IE-SR-4GT | 2873910000 | Firmware_IE-SR-4GT_series | <2.3.4 | 2.3.4 |
| IE-SR-4GT-LTE/4G-EU | 2873920000 | Firmware_IE-SR-4GT_series | <2.3.4 | 2.3.4 |
| IE-SR-4GT-LTE/4G-USEMEA | 2873930000 | Firmware_IE-SR-4GT_series | <2.3.4 | 2.3.4 |
| IE-SR-4GT-M | 2990450000 | Firmware_IE-SR-4GT_series | <2.3.4 | 2.3.4 |
| IE-SR-4GT-LTE/4G-USEMEA-M | 2990440000 | Firmware_IE-SR-4GT_series | <2.3.4 | 2.3.4 |
Vulnerabilities 1
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Critical 9.2
RCE via OOM corruption
PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The s…
KEV Oct 26, 2026
Revision history
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#1.0.0
Initial version
References
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Weidmueller Security Advisory Board
https://support.weidmueller.com/support-center/popular-resources/security-advisory-board
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CERT@VDE Security Advisories for Weidmueller
https://certvde.com/de/advisories/vendor/weidmueller/
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VDE-2026-152: Weidmueller: Security routers IE-SR-4TX and IE-SR-4GT affected by PHP vulnerability - HTML
https://certvde.com/de/advisories/VDE-2026-152