Security readout for executives and security teams
Plain-English summary
CVE-2021-26093 is a FortiWLC flaw that can let a local authenticated user crash an access point managed by the controller. The main business concern is wireless service disruption, not confirmed data theft. The source bundle does not name a patch or workaround.
Executive priority
Treat as a moderate operational resilience issue. Prioritize remediation where FortiWLC supports critical sites, where many administrators have CLI access, or where wireless outages would interrupt business operations.
Technical view
FortiWLC contains a CWE-824 access of uninitialized pointer issue. Sources describe local, low-complexity exploitation by an authenticated attacker through a crafted CLI command, with no user interaction. CVSS 3.1 is 6.6, reflecting high availability impact and low integrity impact.
Likely exposure
Exposure is limited to organizations running Fortinet FortiWLC versions 8.6.0, 8.5.3 and earlier listed in the CVE data, especially where authenticated CLI access is available to operators or local users.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates local access and low privileges are required, so this is less likely to be internet-scale but relevant for insider, compromised-admin, or poorly controlled management environments.
Researcher notes
Do not assume remote exploitation from the provided evidence. Useful validation centers on version confirmation, privilege boundaries, and crash telemetry. The source bundle lacks fixed-version details, so remediation guidance should be tied directly to Fortinet PSIRT content.
Mitigation direction
- Check Fortinet PSIRT FG-IR-21-002 for current upgrade or workaround guidance.
- Restrict FortiWLC CLI access to trusted administrative users only.
- Review and reduce local accounts with controller management privileges.
- Monitor managed access points for unexpected crashes or restarts.
Validation and detection
- Inventory FortiWLC deployments and record exact software versions.
- Compare versions against affected FortiWLC releases listed in the CVE data.
- Review controller authentication logs for unusual CLI activity.
- Confirm whether vendor guidance has been applied or formally risk-accepted.
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.
CWE-824: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-26093 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
- Medium
- CVSS
- 6.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H/E:P/RL:X/RC:R
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:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H/E:P/RL:X/RC:R24.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.6MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H/E:P/RL:X/RC:R
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/psirt/FG-IR-21-002CVE reference
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.
Access of Uninitialized Pointer
Access of Uninitialized Pointer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.