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Vulnerabilities

Vulnerability · CVE-2026-106173

Arbitrary file write in grpc phQueryMaster

Published Oct 13, 2026 · catalog updated Oct 14, 2026 · Fortinet

Check if you run it

No confirmed exploitation is on record for CVE-2026-106173. EPSS is 0.43%. Act only if a listed version of Fortinet is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Not established
Affected products
Fortinet

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-106173

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-106173. EPSS is 0.43%. Act only if a listed version of Fortinet is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Fortinet security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-106173

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-106173

    30-day exploitation probability 0.4%

    first.org
  • Fortinet PSIRTVendor advisoryCVE-2026-106173

    CVE-2026-106173 is named in a Fortinet PSIRT advisory.

    filestore.fortinet.com
  • NIST NVDVulnerability recordCVE-2026-106173

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.