CVE-2026-39808
The record is as the index held it on 2026-10-18. The KEV listing and the EPSS score were read on 2026-10-25. The score is dated to the day it became true. The KEV state is dated to that read. Changes between those two dates are not all shown.
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A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through…
rank 78 = 40 + 23 + 5 + 2 + 8
rank@v1 · act now
Someone is already using it
CISA KEV catalog · public proof-of-concept · FIRST EPSS
EPSS 0.93189 · CISA KEV listed · without this subject the record ranks 38
What it costs you if it fires
NVD CVSS base score, then the CNA's own
CVSS 9.1, from the CNA · without this subject the record ranks 55
It is getting worse, not staying still
FIRST EPSS series, rescorings and bad loads removed
rose on 2026-07-17 · without this subject the record ranks 73
How much of the world it touches
NVD CPE configurations
1 product in the CPE ranges · without this subject the record ranks 76
Someone else already set the date
CISA KEV remediation due date
CISA remediation date held · without this subject the record ranks 70
Hindsight · the state
Foresight · where to check next
This record is one instance of CWE-78, improper neutralization of special elements used in an os command ('os command injection'). The index holds 7058 prior instances of this class, 121 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1
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Check your stack in the mirror · True as of 25 Oct 2026
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CISA KEV & Federal Remediation Deadline from the record and CISA
The fix, and how long it's been waiting.
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Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Exploit Status & Known PoCs a ladder, not a score
Current rung: Exploited in the wild · CISA KEV listed, 2026-07-16.
A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.
$4.65M = $4.99M incident cost x 1 exposure x 0.93189 likelihood
udv@v1 · unaudited · wrong for you until you say what you run
$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.
Attack path
What it is stated by the CNA
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here> receipt
NVD's analysis a second authority
- weakness
- CWE-78
- affected versions
- fortinet fortisandbox >= 4.4.0 <= 4.4.9
- also scored by
- psirt@fortinet.com 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
check it yourself fortiguard.fortinet.com receipt
Dated events
Movement the material steps
This score more than doubled inside 72 hours. Both observations are in the full history below.
Show all 23 observations
23 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt
The full biography
Listed by CISA 93 days after it published, exploit probability more than doubled between 2026-04-22 and 2026-04-23 (0.00133 → 0.11271) and the record had been public for 6 months when this index was last written.
The pattern, elsewhere
This record is one instance of CWE-78, improper neutralization of special elements used in an os command ('os command injection'). The index holds 7058 prior instances of this class, 121 KEV-listed. The nearest of its KEV-listed records are drawn beside this. cwe-consequences@4.20
"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1
7058 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.
No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.
Siblings and hubs
Records related to this one
No record cites this identifier and it carries no alias. Its defect family is below.
Its defect family
fortinet fortisandbox
Of the 12 records in this family that state one, this holds the highest EPSS percentile: 0.99822.
Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.
Family membership: held values
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What usually comes next
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