Security readout for executives and security teams
Plain-English summary
CVE-2019-11859 is a buffer overflow in the ALEOS SMS handler API. The provided CVE text says it may allow code execution as root on affected ALEOS versions. Business urgency is moderate: impact could be severe on exposed devices, but the CVSS vector indicates high privileges and user interaction are required.
Executive priority
Treat as a moderate-priority infrastructure risk. Root-level code execution is serious, but available evidence shows constrained exploitation conditions and no confirmed active exploitation in the provided sources.
Technical view
ALEOS versions before the cited fixed branches, including 4.13.0, 4.9.5, and 4.9.4 per the CVE description, contain an SMS handler API buffer overflow. The CVSS 3.1 score is 6.0 with network attack vector, high attack complexity, high privileges required, user interaction required, unchanged scope, and high confidentiality/integrity impact.
Likely exposure
Exposure is limited to environments running affected ALEOS firmware. The source bundle does not identify specific device models or CPEs, so inventory should focus on ALEOS version evidence rather than assumed product names.
Exploitation context
The bundle does not cite active exploitation, and the KEV flag is false. The CVSS vector suggests exploitation is constrained by high privileges, high complexity, and required user interaction, but successful exploitation may execute code as root.
Researcher notes
Evidence is sparse: the CVE gives the vulnerability class, affected ALEOS version thresholds, CVSS vector, and root execution impact, but no CWE, model list, exploit detail, or explicit mitigation text in the supplied bundle.
Mitigation direction
- Check Sierra Wireless guidance for the applicable fixed ALEOS firmware branch.
- Prioritize upgrade or vendor-approved remediation for affected ALEOS versions.
- Inventory devices running ALEOS and record firmware versions.
- Limit exposure of management and SMS-related interfaces where operationally feasible.
Validation and detection
- Confirm whether each relevant device runs ALEOS.
- Compare firmware versions against the affected version statement in CVE-2019-11859.
- Review vendor bulletin SWI-PSA-2020-004 for product-specific applicability.
- Document any compensating controls for devices awaiting 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
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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-2019-11859 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/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:H/I:H/A:L0.55.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/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.