Security readout for executives and security teams
Plain-English summary
A user with CLI access to affected Fidelis Network or Deception systems could run commands as root. That can turn a lower-privileged account into full control of the appliance and may affect neighboring Fidelis components, making this urgent for environments that run these products.
Executive priority
Treat this as a high-priority remediation item if Fidelis appliances are deployed. The business risk is appliance compromise from a lower-privileged CLI account, with potential movement across related Fidelis components.
Technical view
CVE-2021-35047 is a CWE-78 command injection flaw in Fidelis CommandPost, Collector, and Sensor components. The CVSS 3.1 score is 9.9 with low complexity, low privileges required, no user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations running Fidelis Network or Fidelis Deception versions before 9.3.7 or version 9.4, especially where CLI access exists for non-root users or administrators.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. The issue requires user-level CLI access, but successful abuse could execute root-level commands locally and against neighboring Fidelis components.
Researcher notes
The public bundle identifies affected products, components, version ranges, CWE, CVSS, and patch availability, but does not provide patch identifiers, detailed mitigations, or confirmed exploitation evidence. Avoid assuming exploit-in-the-wild status without additional vendor or KEV confirmation.
Mitigation direction
- Apply Fidelis patches or updates that address CVE-2021-35047.
- Confirm affected systems are not running versions before 9.3.7 or vulnerable 9.4 builds.
- Review Fidelis advisory guidance for exact supported upgrade paths.
- Restrict CLI access to trusted administrators only.
- Monitor affected components for unexpected root-level command activity.
Validation and detection
- Inventory Fidelis Network and Deception appliances and component versions.
- Identify CommandPost, Collector, and Sensor deployments.
- Review CLI user accounts and recent access history.
- Confirm patch status against Fidelis advisory guidance.
- Check logs for suspicious privilege escalation or command execution events.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter 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 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-2021-35047 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
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.fidelissecurity.com/hc/en-us/categories/360001842694-Advisories-News-and-PoliciesCVE reference · x_refsource_CONFIRM
- https://www.securifera.com/blog/2021/06/24/operation-eagle-eye/CVE 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 Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.