Security readout for executives and security teams
Plain-English summary
This FortiOS issue can let a logged-in user who understands FSSO policy setup reach network resources they should not access. It is not described as remotely exploitable by unauthenticated attackers, and the CVSS score is low. The main business concern is inappropriate internal access where FortiOS FSSO policies guard sensitive resources.
Executive priority
Treat as a controlled, targeted remediation item. It does not currently justify emergency response, but affected FortiOS systems using FSSO should be scheduled for vendor-guided remediation.
Technical view
CVE-2025-62439 is CWE-940 in Fortinet FortiOS. Affected branches are 7.6.0-7.6.4, 7.4.0-7.4.9, and all 7.2 and 7.0 versions. The CVSS vector requires local access, low privileges, high complexity, and no user interaction, with limited confidentiality and integrity impact.
Likely exposure
Exposure is most relevant for organizations running affected FortiOS versions with FSSO policy configurations protecting network resources. Risk depends on authenticated user access and knowledge of those configurations.
Exploitation context
The source bundle reports proof-of-concept exploit maturity in CVSS, but CISA KEV is false. No cited source in the bundle states active exploitation.
Researcher notes
Do not assume broad remote exploitability from the available evidence. Focus validation on affected FortiOS branches, FSSO policy presence, authenticated user pathways, and whether Fortinet's advisory names fixed versions or compensating controls.
Mitigation direction
- Inventory FortiOS devices and identify affected 7.6, 7.4, 7.2, and 7.0 versions.
- Review Fortinet PSIRT FG-IR-25-384 for fixed releases or vendor workarounds.
- Prioritize remediation where FSSO policies protect sensitive internal resources.
- Limit unnecessary authenticated access and FSSO policy visibility until remediation is complete.
Validation and detection
- Confirm each FortiOS version against the affected ranges in the CVE record.
- Identify devices using FSSO policies for protected network resources.
- Review access logs for unusual authenticated access to FSSO-protected resources.
- Track remediation status against Fortinet's published advisory.
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-940: 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 lookupCVE-2025-62439 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
- Low
- CVSS
- 3.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:X/RC:R
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.
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:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:X/RC:R1.12.7fortinetVulnerability scoring details
Base CVSS 3.1 score
3.8LowVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:X/RC:R
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.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.fortinet.com/psirt/FG-IR-25-384CVE reference, fortinet
- https://cert-portal.siemens.com/productcert/html/ssa-975644.htmlCVE reference, siemens-SADP
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 Verification of Source of a Communication Channel
Improper Verification of Source of a Communication Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.