Security readout for executives and security teams
Plain-English summary
Siemens LOGO! Soft Comfort before V8.4 can mishandle a malicious project archive during import. The issue is a zip slip path traversal weakness that can alter files and disrupt availability. Siemens notes it could contribute to full system takeover only when chained with other vulnerabilities.
Executive priority
Treat this as a targeted operational technology workstation risk, not an internet-wide emergency. Prioritize upgrade or compensating controls where engineers exchange project files with vendors, integrators, or customers.
Technical view
CVE-2020-25243 is CWE-22 in LOGO! Soft Comfort, all versions before V8.4. A compromised project file can trigger zip slip behavior during import. CVSS 3.1 is 5.1 with local attack vector, low complexity, no privileges, and low integrity and availability impact.
Likely exposure
Exposure is limited to systems running LOGO! Soft Comfort versions earlier than V8.4, especially engineering workstations or support environments that import LOGO! project files from external or untrusted sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The CVSS temporal metric includes proof-of-concept exploitability, but no public exploit details or weaponized campaign evidence is provided here.
Researcher notes
The main evidence is Siemens’ version boundary and description. The chain-to-takeover statement is conditional; the bundle does not identify companion vulnerabilities, exploit prerequisites beyond project import, or confirmed exploitation.
Mitigation direction
- Upgrade LOGO! Soft Comfort to V8.4 or later where applicable.
- Review the Siemens advisory for product-specific remediation guidance.
- Do not import LOGO! project files from untrusted sources.
- Handle received project files through controlled intake and malware scanning.
- Limit engineering workstation access to trusted operators and projects.
Validation and detection
- Inventory all LOGO! Soft Comfort installations and record versions.
- Flag any installation below V8.4 as affected.
- Review recent imports of externally supplied LOGO! project files.
- Confirm engineering workstations restrict untrusted project file handling.
- Track Siemens advisory SSA-983300 for any revised guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-25243 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C2.52.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.1MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/pdf/ssa-983300.pdfCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.