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CVE Record

CVE-2021-24022: A buffer overflow vulnerability in FortiAnalyzer CLI 6.4.5 and below, 6.2.7 and below, 6.0.x and FortiManag...

A buffer overflow vulnerability in FortiAnalyzer CLI 6.4.5 and below, 6.2.7 and below, 6.0.x and FortiManager CLI 6.4.5 and below, 6.2.7 and below, 6.0.x may allow an authenticated, local attacker to perform a Denial of Service attack by running the `diagnose system geoip-city` command with a large ip value.

MediumCVSS 6.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-24022 affects Fortinet FortiAnalyzer and FortiManager CLI. A highly privileged local, authenticated user could trigger a buffer overflow in a GeoIP diagnostic function and cause denial of service. Business urgency is moderate because exploitation requires existing administrative-level access, but management platforms are sensitive operational assets.

Executive priority

Treat as a moderate-priority management-plane issue. It is not described as remotely exploitable, but affected systems administer security infrastructure, so delayed remediation increases operational and incident-response risk.

Technical view

The issue is a buffer overflow in FortiAnalyzer and FortiManager CLI versions 6.4.5 and below, 6.2.7 and below, and 6.0.x. The source description ties exploitation to a GeoIP city diagnostic command with oversized input. CVSS is 6.7, AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, though the description only states denial of service.

Likely exposure

Exposure is limited to organizations running affected FortiAnalyzer or FortiManager versions where users have local CLI access with high privileges. Internet exposure is not indicated by the sources.

Exploitation context

The provided sources do not report active exploitation, and the CVE is not listed as KEV. Exploitation requires authenticated local access with high privileges, so the main concern is abuse of compromised or over-privileged administrator accounts.

Researcher notes

Evidence is strongest for affected products, versions, access requirements, and CVSS. The bundle does not provide exploit status, root-cause detail, or exact fixed versions. The stated denial-of-service impact and CVSS confidentiality/integrity/availability highs should be reconciled against Fortinet advisory details.

Mitigation direction

  • Inventory FortiAnalyzer and FortiManager versions against the affected version ranges.
  • Check Fortinet FG-IR-20-194 for fixed releases and supported upgrade paths.
  • Restrict CLI access to required administrators only.
  • Review and remove stale or excessive Fortinet management accounts.
  • Monitor vendor guidance for any updated mitigation instructions.

Validation and detection

  • Confirm no FortiAnalyzer or FortiManager instance runs an affected version.
  • Review administrative CLI access paths and account assignments.
  • Check audit logs for unusual use of GeoIP diagnostic CLI functionality.
  • Verify upgrade plans include both FortiAnalyzer and FortiManager assets.
  • Document any remaining affected systems with owner and remediation date.
Prepared
Confidence
medium
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-2021-24022 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.7 (3.1)
Known Exploited
No
Published

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

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
6.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.7Medium
CVSS 3.1 vector shape for CVE-2021-24022Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 FortiAnalyzer, FortiManagerFortiAnalyzer 6.4.5 and below, 6.2.7 and below, 6.0.x; FortiManager 6.4.5 and below, 6.2.7 and below, 6.0.xListed
Weakness

CWE details

No CWE listed

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