Security readout for executives and security teams
Plain-English summary
CVE-2019-11853 describes potential command injection in the ALEOS AT command interface. Business urgency is low because exploitation requires high privileges, user interaction, and high complexity, with limited confidentiality, integrity, and availability impact. It still matters for organizations operating older ALEOS deployments in networked environments.
Executive priority
Treat this as a low-priority hygiene item unless affected ALEOS devices support critical operations or expose administrative interfaces broadly. Fold remediation into firmware maintenance, with faster action for internet-reachable or shared-management environments.
Technical view
The CVE record reports several potential command injection issues in ALEOS AT command handling before versions 4.11.0 and 4.9.4. The CVSS 3.1 vector is AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L, indicating network reachability but substantial exploitation prerequisites and limited impact.
Likely exposure
Exposure is most likely in environments running ALEOS versions identified by the vendor bulletin as older than the corrected releases. Risk depends on whether the AT command interface is reachable and usable by highly privileged actors.
Exploitation context
The provided sources do not show known active exploitation, and the CVE is not listed as KEV. The scoring indicates exploitation is difficult and requires high privileges plus user interaction, so opportunistic mass exploitation is not supported by the evidence provided.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, and Sierra Wireless advisory reference. The bundle does not provide exploit details, affected device models, CWE mapping, or proof of active exploitation. Validate applicability against the vendor bulletin before declaring exposure.
Mitigation direction
- Identify ALEOS deployments and record exact firmware versions.
- Review Sierra Wireless bulletin SWI-PSA-2020-004 for affected and corrected versions.
- Upgrade affected ALEOS installations according to vendor guidance.
- Restrict access to AT command interfaces to trusted administrative paths.
- Monitor vendor advisories for device-specific remediation notes.
Validation and detection
- Inventory devices using ALEOS and map firmware versions.
- Confirm whether versions are before 4.11.0 or 4.9.4 as applicable.
- Verify AT command interface exposure and administrative access controls.
- Check change records for vendor-recommended firmware updates.
- Document any device models where applicability remains unclear.
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.
CVE-2019-11853 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
- Low
- CVSS
- 3.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
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:H/PR:H/UI:R/S:U/C:L/I:L/A:L0.53.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.9LowVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
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.