CVE-2026-63587Network attack vector

Unauthenticated SMS command execution via retry-counter disablement

Published Aug 25, 2026 · Updated Aug 27, 2026

Authentication bypass in Weidmüller IE-SR-2TX-WL-4G firmware 1.67 through 1.73 allows remote attackers to execute SMS commands. After five consecutive invalid SMS passwords, the retry counter disables password authorization instead of continuing to reject commands. The SMS receiver must be enabled and reachable through cellular messaging; unauthenticated commands can alter limited settings, disclose limited data, or interrupt the device.

CVSS severity8.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Weidmüller IE-SR-2TX-WL-4G firmware 1.67 through 1.73 allows remote attackers to execute SMS commands. After five consecutive invalid SMS passwords, the retry counter disables password authorization instead of continuing to reject commands. The SMS receiver must be enabled and reachable through cellular messaging; unauthenticated commands can alter limited settings, disclose limited data, or interrupt the device.

The record

CVE
CVE-2026-63587
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
Weidmüller
Product
IE-SR-2TX-WL-4G-US-V
Classifications
CWE-288, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.67 <1.74

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Weidmüller · IE-SR-2TX-WL-4G-US-Vversion=1.67 <1.74
Weidmüller · IE-SR-2TX-WL-4G-EUversion=1.67 <1.74

Published CVSS scores

8.6Weidmueller Interface GmbH & Co. KGCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
8.8Weidmueller Interface GmbH & Co. KGCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T0866Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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