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CVE Record

CVE-2021-26097: An improper neutralization of special elements used in an OS Command vulnerability in FortiSandbox 3.2.0 th...

An improper neutralization of special elements used in an OS Command vulnerability in FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4, and 3.0.0 through 3.0.6 may allow an authenticated attacker with access to the web GUI to execute unauthorized code or commands via specifically crafted HTTP requests.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-26097 is a high-severity FortiSandbox flaw that could let a logged-in web GUI user run unauthorized system commands. The business risk is serious because successful abuse could affect confidentiality, integrity, and availability of a sandboxing platform used in security workflows.

Executive priority

Prioritize remediation for any affected FortiSandbox instance with broad GUI reachability or many authenticated users. Treat internet-facing or shared-admin deployments as urgent, even without confirmed exploitation evidence.

Technical view

The issue is improper neutralization of special elements in an OS command path in FortiSandbox. A network-reachable, authenticated attacker with web GUI access may execute unauthorized code or commands using crafted HTTP requests. CVSS 3.1 is 8.8 with low attack complexity and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is limited to Fortinet FortiSandbox versions 3.0.0-3.0.6, 3.1.0-3.1.4, and 3.2.0-3.2.2, especially where the web GUI is reachable by users beyond a tightly controlled admin group.

Exploitation context

The provided sources do not show CISA KEV listing or confirmed active exploitation. The vulnerability still matters because it is remotely reachable over the network after authentication and requires no user interaction.

Researcher notes

The source bundle provides affected versions, CVSS, attack requirements, and Fortinet advisory reference, but not fixed release details. Avoid assuming exploit availability or patch names beyond Fortinet’s published advisory.

Mitigation direction

  • Check Fortinet advisory FG-IR-20-198 for fixed versions or vendor workarounds.
  • Upgrade affected FortiSandbox systems according to Fortinet guidance.
  • Restrict FortiSandbox web GUI access to trusted admin networks.
  • Remove unnecessary FortiSandbox web GUI user accounts.
  • Monitor for suspicious authenticated web GUI activity.

Validation and detection

  • Inventory all FortiSandbox appliances and record exact versions.
  • Flag versions 3.0.0-3.0.6, 3.1.0-3.1.4, and 3.2.0-3.2.2.
  • Verify whether the web GUI is internet-facing or broadly reachable internally.
  • Review authenticated web GUI access logs for unusual requests.
  • Confirm remediation status against Fortinet advisory FG-IR-20-198.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-26097 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:X

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:X2.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2021-26097Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:X

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
FortinetFortinet FortiSandboxFortiSandbox 3.2.2, 3.2.1, 3.2.0, 3.1.4, 3.1.3, 3.1.2, 3.1.1, 3.1.0, 3.0.6, 3.0.5, 3.0.4, 3.0.3, 3.0.2, 3.0.1, 3.0.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.