Fortinet FortiSIEM Path Traversal Flaw (CVE-2026-106173) Rated CVSS 9.4
A newly published critical vulnerability in Fortinet FortiSIEM carries a CVSS score of 9.4. Here is what is affected and how to respond.
Key points
- CVE-2026-106173 affects Fortinet FortiSIEM.
- CVSS 9.4 (Critical).
- No exploitation confirmed yet.
A critical path traversal tracked as CVE-2026-106173 has been published in the National Vulnerability Database for Fortinet FortiSIEM, with a CVSS base score of 9.4.
At a glance
- CVE
- CVE-2026-106173
- Product
- Fortinet FortiSIEM
- CVSS
- 9.4 Critical
- Weakness
- path traversal
- Exploited
- No known exploitation
What is the vulnerability?
The NVD entry states: A improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiSIEM 7.5.0 may allow attacker to execute unauthorized code or commands via specially crafted packets.
Affected versions
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiSIEM | 7.5.0, up to 7.4.2, up to 7.3.5, up to 7.2.7 |
CVSS 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.
Is it being exploited?
There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.
What should you do?
- Identify whether the affected product and versions run in your environment.
- Apply the vendor update listed in the advisory as soon as it is available.
- Limit network exposure of the affected service until it is patched.
- Monitor the vendor advisory for updated guidance or exploitation reports.
What to do and how to stay safe: CVE-2026-106173
- Vulnerability severity scores ignore your specific architecture and context.
- Exploitability depends on network exposure and user behavior, not just code flaws.
- Prioritization requires continuous asset inventory and threat intelligence alignment.
Risk-based vulnerability management focuses your limited resources on the flaws that actually threaten your business. Start by mapping your critical assets and checking for active exploits to prioritize your backlog.
Step-by-step guide: Risk-Based Vulnerability Management: Prioritize Fixes by Actual Danger
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-106173?
CVE-2026-106173 is a path traversal vulnerability in Fortinet FortiSIEM.
How severe is CVE-2026-106173?
It has a CVSS score of 9.4 Critical.
Is CVE-2026-106173 being exploited?
There is no public confirmation of exploitation at the time of publication.
