Security readout for executives and security teams
Plain-English summary
Some FortiSOAR deployments can return configured Secure Message Exchange or RADIUS passwords in cleartext to a logged-in attacker. This is not unauthenticated internet compromise, but it can expose high-value integration credentials inside a security automation platform.
Executive priority
Treat as a targeted credential-exposure issue, not a mass remote takeover. Prioritize remediation for FortiSOAR systems connected to identity, messaging, or core security workflows because stolen integration passwords can expand attacker access.
Technical view
CVE-2026-21742 is a CWE-319 cleartext sensitive-information exposure in FortiSOAR PaaS and on-premise versions 7.3, 7.4, selected 7.5, and selected 7.6 releases. With low privileges and user interaction, an authenticated attacker may view cleartext passwords in responses for Secure Message Exchange and RADIUS queries when those features are configured.
Likely exposure
Exposure is limited to FortiSOAR instances running affected versions with Secure Message Exchange or RADIUS configured. Risk is higher where many users have FortiSOAR access or where exposed credentials bridge into directory, messaging, or security operations systems.
Exploitation context
The source bundle marks CISA KEV as false, so active exploitation is not established here. The CVSS vector reports proof-of-concept exploit maturity, but the provided sources do not include exploit details or evidence of broad abuse.
Researcher notes
The key condition is configuration-dependent exposure of cleartext passwords in specific query responses. The bundle does not provide fixed-version details beyond an official-fix signal, so validation should rely on Fortinet FG-IR-26-106 and local configuration review.
Mitigation direction
- Inventory FortiSOAR PaaS and on-premise versions against Fortinet advisory FG-IR-26-106.
- Apply Fortinet's official fix or vendor-recommended upgrade path for affected deployments.
- Restrict FortiSOAR access to trusted administrators until remediation is complete.
- Rotate exposed Secure Message Exchange and RADIUS credentials if affected responses may have been viewed.
- Review FortiSOAR user roles and remove unnecessary low-privilege access.
Validation and detection
- Confirm whether Secure Message Exchange or RADIUS is configured in FortiSOAR.
- Map installed FortiSOAR versions to the affected 7.3, 7.4, 7.5, and 7.6 ranges.
- Review access logs for unusual authenticated FortiSOAR queries around these integrations.
- After upgrade, verify vendor guidance shows the instance is no longer affected.
- Check whether exposed credentials were reused in connected systems.
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-319: 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-21742 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
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/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.
SSVC decision data
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:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C2.13.6fortinetVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.fortinet.com/psirt/FG-IR-26-106CVE reference, fortinet
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.
Cleartext Transmission of Sensitive Information
Cleartext Transmission of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.