CVE-2026-63586

Unauthenticated Remote Code Execution via Shell Injection in Web Management Interface

Published Aug 25, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
The web-based management interface uses a modified uhttpd server with CGI shell scripts. The HTTP Basic Authentication username, taken directly from the Authorization header without sanitization, is inserted into a shell command string executed via the system() function. By submitting a specially crafted username containing shell metacharacters, an unauthenticated attacker with network access to the device can escape the command context and execute arbitrary commands with root privileges.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The web-based management interface uses a modified uhttpd server with CGI shell scripts. The HTTP Basic Authentication username, taken directly from the Authorization header without sanitization, is inserted into a shell command string executed via the system() function. By submitting a specially crafted username containing shell metacharacters, an unauthenticated attacker with network access to the device can escape the command context and execute arbitrary commands with root privileges.
Title Unauthenticated Remote Code Execution via Shell Injection in Web Management Interface
First Time appeared Weidmueller
Weidmueller fwr Ie Sr 2tx Wl
Weidmueller fwr Ie Sr 2tx Wl 4g Eu Us
Weaknesses CWE-78
CPEs cpe:2.3:o:weidmueller:fwr_ie_sr_2tx_wl:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:fwr_ie_sr_2tx_wl_4g_eu_us:*:*:*:*:*:*:*:*
Vendors & Products Weidmueller
Weidmueller fwr Ie Sr 2tx Wl
Weidmueller fwr Ie Sr 2tx Wl 4g Eu Us
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERTVDE
Published
Updated
Aug 25, 2026, 2:39 PM
Reserved
Jul 17, 2026, 6:47 AM
Status
Deferred
Published
Aug 25, 2026, 9:17 AM
Modified
Sep 3, 2026, 4:57 PM