Security readout for executives and security teams
Plain-English summary
CVE-2021-36182 is a high-severity command injection issue in Fortinet FortiWeb 6.3.13 and earlier 6.3.x releases. An authenticated attacker could use crafted HTTP requests to run unauthorized commands. Because FortiWeb is security infrastructure, compromise could affect confidentiality, integrity, and availability.
Executive priority
Handle as a high-priority security infrastructure issue. It requires authentication, which lowers likelihood, but successful exploitation could give an attacker command execution on a FortiWeb appliance with high business impact.
Technical view
The CVSS 3.1 vector is 8.8 high: network-accessible, low complexity, low privileges required, no user interaction, unchanged scope, with high confidentiality, integrity, and availability impact. The provided sources describe improper neutralization of command elements in FortiWeb 6.3.13 and below via crafted HTTP requests.
Likely exposure
Organizations running Fortinet FortiWeb 6.3.0 through 6.3.13 should assume potential exposure, especially where authenticated users can reach HTTP interfaces. The source bundle does not identify other affected branches or products.
Exploitation context
The CVE record indicates proof-of-concept maturity in the CVSS vector, but the bundle does not cite active exploitation. It is not listed as CISA KEV in the provided data, so treat exploitation status as unconfirmed.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, affected 6.3.x versions, and Fortinet advisory reference. Do not assume affected versions beyond those listed. Validate exposure through asset inventory, version checks, access paths, and vendor advisory review.
Mitigation direction
- Identify all FortiWeb appliances and record running versions.
- Prioritize FortiWeb 6.3.13 and earlier 6.3.x for remediation review.
- Check Fortinet advisory FG-IR-21-047 for fixed releases and upgrade instructions.
- Reduce unnecessary network reachability to affected FortiWeb HTTP interfaces.
- Review privileged FortiWeb accounts and remove unnecessary access.
Validation and detection
- Confirm whether any FortiWeb instance runs version 6.3.0 through 6.3.13.
- Verify whether authenticated users can reach FortiWeb HTTP interfaces.
- Review appliance and access logs for unusual authenticated HTTP activity.
- Document remediation status against Fortinet advisory FG-IR-21-047.
- Confirm compensating controls do not replace required vendor remediation.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36182 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
- 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:P/RL:X/RC:C
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:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-21-047CVE 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.