Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated attacker make affected Fortinet FortiSandbox or FortiAuthenticator devices become unresponsive. The business impact is availability loss for security or authentication infrastructure, not data theft based on the supplied sources.
Executive priority
Treat as a high-priority availability risk if affected Fortinet devices support security operations or authentication workflows, especially when login interfaces are externally reachable.
Technical view
CVE-2021-22124 is an uncontrolled resource consumption denial-of-service issue in login modules. It affects listed FortiSandbox 3.0.x, 3.1.x, and 3.2.0-3.2.2 releases, plus FortiAuthenticator before 6.0.6. CVSS 3.1 is 7.5, network-reachable, low complexity, no privileges, no user interaction.
Likely exposure
Exposure is most relevant where FortiSandbox or FortiAuthenticator login interfaces are reachable by untrusted networks. Internet-facing or broadly accessible management/authentication portals carry higher operational risk.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates remote unauthenticated denial of service is feasible, but no weaponization details are provided.
Researcher notes
Evidence is limited to CVE metadata and the Fortinet advisory reference. No CWE is listed in the bundle. Avoid assuming confidentiality or integrity impact; the supplied CVSS vector only supports availability impact.
Mitigation direction
- Inventory FortiSandbox and FortiAuthenticator versions against the affected ranges.
- Upgrade FortiAuthenticator systems older than 6.0.6.
- Check Fortinet advisory FG-IR-20-170 for FortiSandbox fixed-release guidance.
- Restrict access to administrative and login interfaces from untrusted networks.
- Monitor affected services for resource exhaustion and unexpected unresponsive states.
Validation and detection
- Confirm installed FortiSandbox versions are outside the listed affected ranges.
- Confirm FortiAuthenticator is running 6.0.6 or later.
- Review exposure of login interfaces to internet or untrusted networks.
- Check logs and monitoring for availability events around login activity.
- Validate remediation against Fortinet advisory FG-IR-20-170.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-22124 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:X/RC:X
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:X/RC:X3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:X/RC:X
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-20-170CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.