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CVE-2021-26098

HIGH
7.5
CVSS Score
Published: August 4, 2021 at 01:20 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
1 product affected across 1 vendorFortiSandbox

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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

An instance of small space of random values in the RPC API of FortiSandbox before 4.0.0 may allow an attacker in possession of a few information pieces about the state of the device to possibly predict valid session IDs.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiSandbox· Fortinet
95%
v ≤ 3.1.4v < 4.0.03.2.0 ≤ v < 3.2.3
Affected range stops below 3.2.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://fortiguard.com/advisory/FG-IR-20-218

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-330

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