ZDI-26-645: Fortinet FortiSandbox write_remote_backup_to_crontab cronValue Command Injection Remote Code Execution Vulnerability
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key metrics
- CVSS
- 7.2
- EPSS
- 1%
Key insight
Authenticated remote code execution in Fortinet FortiSandbox via command injection allows attackers to compromise systems where the product is deployed.
Description
CVE-2026-84387 affects Fortinet FortiSandbox and allows authenticated remote attackers to execute arbitrary code on affected installations. The vulnerability stems from insufficient validation of cronValue parameters in the write_remote_backup_to_crontab function, leading to command injection. The CVSS score is 7.2 (High), indicating significant severity. Authentication is required, limiting risk to internal or authorized users.
Risk score
- cvss base
- 72.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 15.00
- raw before weight
- 87.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 1.00
- days old
- 0.00
- vendor mismatch penalty
- 0.00
- vote penalty
- -2.00
Path: operational
Consensus check
Models disagree: Models disagree on severity
- Vote penalty:
- −2.0
- Total penalty:
- −2.0