Security readout for executives and security teams
Plain-English summary
CVE-2025-25256 is a critical FortiSIEM flaw allowing an unauthenticated remote attacker to run commands through crafted CLI requests. Successful exploitation could expose security data, alter monitoring, or disrupt the platform. Public technical and exploit material increases urgency, although the supplied sources do not establish active exploitation.
Executive priority
Treat as an immediate remediation priority, particularly for externally reachable or broadly accessible FortiSIEM systems. The combination of unauthenticated remote command execution, critical impact, and public exploit material warrants accelerated inventory, exposure reduction, vendor-directed upgrading, and compromise assessment.
Technical view
This CWE-78 OS command injection affects FortiSIEM 7.3.0–7.3.1, 7.2.0–7.2.5, 7.1.0–7.1.7, 7.0.0–7.0.3, 6.7.0–6.7.9, all 6.6–6.1 and 5.4–5.0 versions, plus all 4.10, 4.9, and 4.7 versions. CVSS 3.1 is 9.8: network-accessible, low-complexity, unauthenticated, and requiring no user interaction.
Likely exposure
Exposure exists wherever an affected FortiSIEM version is deployed and its vulnerable CLI interface is reachable by an attacker. Internet exposure or access from untrusted networks materially increases risk. The bundle does not provide deployment prevalence or confirmed vulnerable asset counts.
Exploitation context
Public technical analysis and an exploit repository are listed, indicating that practical reproduction information is available. However, this CVE is not marked as CISA KEV in the supplied bundle, and no supplied source confirms active exploitation in the wild.
Researcher notes
The disclosed weakness is OS command injection through crafted CLI requests. The CVSS vector indicates remote, low-complexity exploitation without privileges or user interaction, with high confidentiality, integrity, and availability impact. Public exploit material exists, but the supplied evidence does not prove real-world exploitation or identify a specific campaign.
Mitigation direction
- Inventory FortiSIEM installations and identify versions within the documented affected ranges.
- Consult Fortinet advisory FG-IR-25-152 for supported upgrade targets and vendor-approved mitigation guidance.
- Restrict affected CLI access to trusted management networks and authorized administrative systems.
- Isolate and investigate affected systems if unauthorized command execution or unexpected changes are suspected.
Validation and detection
- Confirm each FortiSIEM version using authoritative asset and platform records.
- Verify whether the affected CLI interface is reachable from internet or untrusted network segments.
- Review relevant logs and system changes for unexplained commands, processes, accounts, or configuration modifications.
- After remediation, confirm the installed release falls outside affected ranges according to Fortinet 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-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-2025-25256 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/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.
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:H/RL:O/RC:C3.95.9fortinetVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/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.
- 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-25-152CVE reference, fortinet
- https://github.com/watchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256CVE reference, CISA-ADP · exploit
- https://labs.watchtowr.com/should-security-solutions-be-secure-maybe-were-all-wrong-fortinet-fortisiem-pre-auth-command-injection-cve-2025-25256/CVE reference, CISA-ADP · technical-description
- https://www.theregister.com/2025/08/13/fortinet_discloses_critical_bug/CVE reference, CVE
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.