Security readout for executives and security teams
Plain-English summary
CVE-2019-11850 is a stack overflow in the ALEOS AT command interface before 4.11.0. The impact could be code execution, but exploitation appears constrained by local access, high privileges, high complexity, and user interaction.
Executive priority
Treat this as a targeted remediation item, not an internet-wide emergency. Prioritize environments with ALEOS devices below 4.11.0 in critical operations or exposed management workflows.
Technical view
The vulnerability affects ALEOS AT command handling before 4.11.0. CVSS 3.1 score is 6.3 with local attack vector, high complexity, high privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in organizations operating ALEOS-based devices below version 4.11.0 where trusted or administrative users can access the AT command interface.
Exploitation context
The source bundle does not show KEV listing or cited active exploitation. The CVSS vector indicates meaningful exploitation barriers, but successful exploitation could have severe device-level impact.
Researcher notes
Evidence is limited to the CVE metadata and Sierra Wireless bulletin reference. The CVSS vector materially narrows exploitability, but the impact rating remains high across CIA if code execution is achieved.
Mitigation direction
- Inventory ALEOS deployments and identify versions older than 4.11.0.
- Review the Sierra Wireless bulletin for supported remediation guidance.
- Upgrade affected ALEOS systems to a vendor-supported fixed release where applicable.
- Restrict AT command interface access to authorized administrative workflows only.
- Monitor vendor advisories for device-specific operational mitigations.
Validation and detection
- Confirm ALEOS version on each managed device.
- Verify whether AT command interface access is locally or administratively reachable.
- Check configuration and access controls around privileged device management paths.
- Document devices that cannot be upgraded and track vendor guidance for them.
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-2019-11850 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
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/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:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H0.35.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2020-004/CVE reference · x_refsource_MISC
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.