CVE-2026-63587: CWE-288 Authentication Bypass Using an Alternate Path or Channel in Weidmueller Interface IE-SR-2TX-WL-4G-EU
Description
CVE-2026-63587 is an authentication bypass vulnerability in the Weidmueller IE-SR-2TX-WL-4G-EU device's SMS control function. The device can be configured to require a password for SMS commands, with a retry counter that disables password authorization after 5 failed attempts. An unauthenticated attacker can exploit this by sending 5 invalid SMS password attempts, causing the device to disable password checks and accept subsequent SMS commands without authentication. This can lead to limited configuration tampering, information leakage, and potentially full loss of availability. The vulnerability affects version 1.67 of the device firmware. No patch or official remediation is currently available. The CVSS 4.0 score is 8.8, indicating high severity.
CVSS v4.0
Score 8.8high
Affected software
Weidmueller Interface
IE-SR-2TX-WL-4G-EU
Weidmueller Interface
IE-SR-2TX-WL-4G-US-V
pkg:github/weidmueller/interface-ie-sr-2tx-wl-4g-euRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The IE-SR-2TX-WL-4G-EU device includes an SMS control function that can require password authorization for SMS commands. The device tracks failed SMS password attempts and disables password authorization after 5 consecutive failures. This behavior allows an unauthenticated remote attacker to bypass SMS command authentication by deliberately triggering the retry limit with invalid passwords. Once password authorization is disabled, the attacker can send SMS commands without authentication, potentially causing limited configuration changes, information leakage, or denial of service. The vulnerability is identified as CWE-288 (Authentication Bypass Using an Alternate Path or Channel). It affects firmware version 1.67. No vendor advisory or patch information is available, and no known exploits are reported in the wild.
Potential Impact
An unauthenticated remote attacker can bypass SMS command authentication by triggering the retry limit, leading to unauthorized execution of SMS commands without password verification. This can result in limited configuration tampering, limited information leakage, and potentially complete loss of device availability.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users should monitor vendor communications for updates. Until a fix is provided, restricting SMS access to trusted sources or disabling SMS command functionality where possible may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERTVDE
- Date Reserved
- 2026-07-17T06:47:50.712Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8d5b63acd9273b49f36566
Added to database: 08/25/2026, 09:07:47 UTC
Last enriched: 09/10/2026, 06:52:21 UTC
Last updated: 10/09/2026, 06:48:18 UTC
Views: 46
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