Security readout for executives and security teams
Plain-English summary
FactoryTalk Linx 6.11 and earlier has a heap overflow that could let a remote, unauthenticated attacker achieve code execution by sending malicious port ranges. The bundle does not provide CVSS scoring or confirmed exploitation evidence, but unauthenticated remote code execution in an operational technology product is business-significant.
Executive priority
Treat this as a high-priority OT exposure review if FactoryTalk Linx is present. The urgency comes from unauthenticated remote code execution potential, not from confirmed exploitation in the supplied evidence.
Technical view
CVE-2020-27251 is described as CWE-122 heap-based buffer overflow in FactoryTalk Linx 6.11 and prior. The attack condition cited is remote unauthenticated submission of malicious port ranges, with possible remote code execution. No exploit chain, affected deployment prerequisites, or fixed version details are included in the supplied bundle.
Likely exposure
Exposure is likely limited to environments running FactoryTalk Linx version 6.11 or earlier, especially systems reachable over networks where untrusted hosts can interact with the vulnerable service. The supplied sources do not identify specific ports, configurations, or downstream products.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. The described impact is still serious because the vulnerability is remote and unauthenticated, with potential code execution from crafted port-range input.
Researcher notes
Evidence is sparse in the supplied bundle. Avoid assuming exploit availability, exact ports, or a specific fixed version without the referenced advisory or vendor bulletin. Focus validation on version inventory, reachability, and vendor-confirmed remediation.
Mitigation direction
- Identify all FactoryTalk Linx deployments and record installed versions.
- Prioritize FactoryTalk Linx 6.11 and earlier for remediation review.
- Check CISA and vendor guidance for fixed releases or approved mitigations.
- Restrict network access to FactoryTalk Linx from untrusted systems.
- Apply OT change control before updates in production environments.
Validation and detection
- Confirm whether FactoryTalk Linx is installed on OT and engineering workstations.
- Verify installed versions against the affected range: 6.11 and prior.
- Review network paths that can reach the FactoryTalk Linx service.
- Check vendor or CISA advisory status for remediation instructions.
- Document compensating controls if patching cannot occur immediately.
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-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-27251 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-20-329-01CVE 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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.