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CVE Record

CVE-2021-26114: Multiple improper neutralization of special elements used in an SQL command vulnerabilities in FortiWAN bef...

Multiple improper neutralization of special elements used in an SQL command vulnerabilities in FortiWAN before 4.5.9 may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

FortiWAN appliances before version 4.5.9 contain critical SQL injection flaws. An unauthenticated remote attacker could send crafted HTTP requests that may lead to unauthorized command or code execution. For organizations using FortiWAN, this is urgent because compromise could affect confidentiality, integrity, and availability of the appliance.

Executive priority

Treat this as a critical infrastructure remediation item if FortiWAN is present. Confirm exposure immediately, upgrade affected appliances, and reduce untrusted HTTP reachability until fixed. The provided evidence does not prove active exploitation, but the technical conditions make delay risky.

Technical view

CVE-2021-26114 is multiple improper neutralization of SQL command elements in Fortinet FortiWAN before 4.5.9. The CVSS 3.1 score is 9.8, with network attack vector, low complexity, no privileges, and no user interaction required. The source states crafted HTTP requests may allow unauthorized code or command execution.

Likely exposure

Exposure is limited to Fortinet FortiWAN deployments running versions before 4.5.9, especially where FortiWAN HTTP interfaces are reachable by untrusted networks. The provided sources do not identify other affected Fortinet products.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. The risk is still high because the flaw is remotely reachable, unauthenticated, low complexity, and has potential full confidentiality, integrity, and availability impact.

Researcher notes

The affected statement is FortiWAN before 4.5.9. The CVSS vector indicates unauthenticated network exploitation without user interaction. Sources do not provide CWE mapping, detailed endpoints, proof of exploitation, or workaround specifics beyond the fixed-version boundary.

Mitigation direction

  • Upgrade Fortinet FortiWAN appliances to version 4.5.9 or later.
  • Review Fortinet PSIRT FG-IR-21-062 for current vendor guidance.
  • Restrict untrusted HTTP access to FortiWAN until remediation is complete.
  • Prioritize externally reachable appliances before internal-only deployments.

Validation and detection

  • Inventory all FortiWAN appliances and record their running versions.
  • Confirm no appliance is running a version before 4.5.9.
  • Check whether FortiWAN HTTP interfaces are exposed to untrusted networks.
  • Review web access logs for unusual unauthenticated requests to FortiWAN interfaces.
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-2021-26114 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

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

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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C3.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2021-26114Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 FortiWANFortiWAN before 4.5.9Listed
Weakness

CWE details

No CWE listed

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