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CVE-2021-42022

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-14 · updated 2026-06-17
• Weakness: CWE-22

Description

A vulnerability has been identified in SIMATIC eaSie PCS 7 Skill Package (All versions < V21.00 SP3). When downloading files, the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read unexpected critical files. The affected file download function is disabled by default.

Affected products

• Siemens SIMATIC eaSie PCS 7 Skill Package: through 20.07; 21.00, 21.00-sp1, 21.00-sp2

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-199605.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-199605.pdf

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