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CVE-2026-63587— SMS Password Authorization Bypass via Failed Attempt Counter

Quick assessment

Affected
Weidmueller Interface IE-SR-2TX-WL-4G-EU
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IE-SR-2TX-WL-4G 设备的短信控制功能可通过“启用密码认证”（Enable Password Authorization）设置，要求对短信命令进行密码验证。每次短信密码验证失败时，设备会递增重试计数器；在连续5次密码验证失败后，系统将自动禁用短信密码认证功能。攻击者若能向该设备发送短信（无需身份认证），可通过故意提交5次或以上的错误密码来触发此机制。此后，后续的短信命令将在无需密码验证的情况下被执行，从而导致潜在的有限配置篡改、有限的信息泄露，以及可能的完全可用性丧失（拒绝服务）。

CVSS 8.6 · High EPSS 0.27% · P19

Affected Version Matrix 2

VendorProduct Version RangeStatus
Weidmueller Interface IE-SR-2TX-WL-4G-EU 1.67< 1.74 affected
Weidmueller Interface IE-SR-2TX-WL-4G-US-V 1.67< 1.74 affected
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I. Basic Information for CVE-2026-63587

Vulnerability Information
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Vulnerability Title
SMS Password Authorization Bypass via Failed Attempt Counter
Source: CVE Program / CVE List V5
Vulnerability Description
The SMS control function of IE-SR-2TX-WL-4G devices can require a password for SMS commands via the 'Enable Password Authorization' setting. The device increments a retry counter on each failed SMS password attempt; after 5 consecutive failed attempts, SMS password authorization is automatically disabled. An unauthenticated remote attacker who is able to send SMS messages to the device can deliberately trigger this by submitting 5 or more invalid passwords, after which subsequent SMS commands are executed without requiring a password, resulting in potential limited configuration tampering, limited information leakage and potentially full loss of availability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Weidmueller Interface IE-SR-2TX-WL-4G-EU 1.67 ~ 1.74 -
Weidmueller Interface IE-SR-2TX-WL-4G-US-V 1.67 ~ 1.74 -

II. Public POCs for CVE-2026-63587

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III. Intelligence Information for CVE-2026-63587

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Vendor Advisories for CVE-2026-63587 (1)

IV. Related Vulnerabilities

Same vendor: Weidmueller Interface
Same weakness: CWE-288

V. Comments for CVE-2026-63587

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