Security readout for executives and security teams
Plain-English summary
CVE-2026-25089 is a critical Fortinet FortiSandbox command injection flaw. An unauthenticated remote attacker may execute unauthorized system commands through crafted HTTP requests. Because CISA KEV lists it, treat exploitation as active and prioritize exposed FortiSandbox deployments immediately.
Executive priority
Treat this as an urgent perimeter-security issue. The flaw is unauthenticated, remote, critical severity, and KEV-listed, so affected deployments should be remediated ahead of routine patch cycles.
Technical view
The issue is CWE-78 OS command injection affecting FortiSandbox 5.0.0-5.0.5, 4.4.0-4.4.8, all 4.2 versions, and FortiSandbox Cloud/PaaS 5.0.4-5.0.5. CVSS v3.1 is 9.1 with network access, low complexity, no privileges, no user interaction, and high CIA impact.
Likely exposure
Organizations using FortiSandbox appliances, FortiSandbox Cloud, or FortiSandbox PaaS in the listed versions are potentially exposed, especially where HTTP interfaces are reachable from untrusted networks.
Exploitation context
Active exploitation is supported by the CISA KEV listing. The provided bundle does not include exploit details, affected endpoints, indicators, or fixed version numbers beyond Fortinet's advisory reference.
Researcher notes
Evidence supports critical impact and active exploitation, but the provided sources do not include endpoint details, payloads, indicators, or explicit fixed versions. Avoid assuming scope outside the named FortiSandbox product families and versions.
Mitigation direction
- Review Fortinet PSIRT FG-IR-26-141 and apply the vendor-specified fix.
- Inventory all FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS versions.
- Restrict HTTP access to trusted administrative networks only.
- Prioritize remediation for internet-reachable or partner-reachable instances.
- Contact Fortinet support if Cloud or PaaS remediation status is unclear.
Validation and detection
- Confirm deployed versions against the affected ranges in the CVE record.
- Check whether FortiSandbox HTTP interfaces are reachable from untrusted networks.
- Verify Fortinet advisory remediation has been applied or scheduled.
- Review access logs for unusual unauthenticated HTTP activity.
- Track CISA KEV requirements for operational deadlines.
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-2026-25089 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
- 9.1 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/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.
CISA KEV status
SSVC decision data
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:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C3.95.9fortinetVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2026-25089 added to CISA KEV
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-07-16T00:00:00.000Z: CVE-2026-25089 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.fortinet.com/psirt/FG-IR-26-141CVE reference, fortinet
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25089CVE reference, CISA-ADP · government-resource
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.