Security readout for executives and security teams
Plain-English summary
Airleader Master 6.381 and earlier reportedly allows unauthenticated uploads of dangerous file types to privileged web pages. In practical terms, an attacker who can reach the service may be able to run code on the server. This is a critical server-compromise risk for exposed deployments.
Executive priority
Treat this as urgent for any reachable Airleader Master deployment. A successful attack could compromise the server and disrupt operations. Prioritize exposure reduction immediately, then follow vendor and CISA guidance for remediation as it becomes available.
Technical view
CVE-2026-1358 is CWE-434 in Airleader Master versions 6.381 and prior. The CVE states multiple web pages allow unrestricted file upload while running with maximum privileges, potentially enabling unauthenticated remote code execution. CVSS v3.1 is 9.8, network exploitable, low complexity, no privileges or user interaction required.
Likely exposure
Highest exposure is any Airleader Master web interface reachable from the internet, partner networks, or broad internal networks. The source data does not identify cloud services or other Airleader products as affected. Asset owners should verify installed Airleader Master versions and network reachability.
Exploitation context
The CVE and CISA ICS advisory describe potential unauthenticated remote code execution. The provided data does not show CISA KEV listing or confirmed active exploitation. Public exploit availability is not established in the provided sources.
Researcher notes
The source bundle contains a minor affected-product data inconsistency: the description states versions 6.381 and prior, while the affected entry lists version “0” with default unaffected. Use the narrative description and advisories for triage, and confirm details with vendor/CISA materials.
Mitigation direction
- Identify Airleader Master instances and confirm whether versions are 6.381 or earlier.
- Check CISA, Airleader, and SYSS advisories for current vendor remediation guidance.
- Remove direct internet exposure for affected Airleader Master systems.
- Restrict access to trusted administrative networks and users only.
- Monitor affected servers for unexpected uploaded files or web process activity.
- Prioritize backups and recovery planning before remediation changes.
Validation and detection
- Inventory Airleader Master deployments and record exact version numbers.
- Confirm whether web interfaces are reachable from untrusted networks.
- Review server logs for unauthenticated upload activity.
- Check file system locations used by the application for unexpected files.
- Validate compensating network controls block untrusted access.
- Document whether vendor guidance or an update is available.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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-2026-1358 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-043-10CVE reference
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-043-10.jsonCVE reference
- https://airleader.us/contact/CVE reference
- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-044.txtCVE 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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.