CVE-2021-42022
CVE-2021-42022 is a medium-severity vulnerability in Siemens Simatic Easie Pcs 7 Skill with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-22
- Affected product: Siemens Simatic Easie Pcs 7 Skill
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-42022?
- 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.
- How severe is CVE-2021-42022?
- CVE-2021-42022 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-42022 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42022?
- CVE-2021-42022 primarily affects Siemens Simatic Easie Pcs 7 Skill. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-42022?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-42022 published?
- CVE-2021-42022 was published on 2021-12-14 and last updated on 2026-06-17.
References
Affected products (4)
- cpe:2.3:a:siemens:simatic_easie_pcs_7_skill:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_easie_pcs_7_skill:21.00:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_easie_pcs_7_skill:21.00:sp1:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_easie_pcs_7_skill:21.00:sp2:*:*:*:*:*:*
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