CVE-2026-85114 .NET Client Library for SIMATIC S7 Webserver API - Path Traversal

.NET Client Library for SIMATIC S7 Webserver API < 3.3.61 contains a path traversal caused by improper validation of filenames during ticket downloads, letting attackers write arbitrary files outside intended directories, exploit requires attacker to manipulate ticket response.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Write
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to version 3.3.61 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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