Security readout for executives and security teams
CVE-2019-11851 is a critical remote code execution flaw in the ACENet service of Sierra Wireless ALEOS. An unauthenticated remote attacker could potentially take control of affected devices through a buffer overflow. Business urgency is highest where ALEOS devices are reachable from untrusted networks. Exposure is likely in organizations using Sierra Wireless devices running affected ALEOS versions, especially if ACENet or device management paths are reachable across operational networks, partner networks, or the internet. The provided bundle does not identify specific device models or CPEs. Treat this as urgent for any exposed or operationally important ALEOS deployment. The vulnerability allows remote code execution without authentication, which can affect confidentiality, integrity, and availability. Prioritize inventory, exposure reduction, and firmware updates. Mitigation focus: Upgrade ALEOS to 4.4.9, 4.9.5, or 4.14.0 as applicable.; Review Sierra Wireless security guidance for model-specific instructions.; Restrict untrusted network access to affected ALEOS services..
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
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ATT&CK lookup starting points
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CWE-120: Exact CWE lookup
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Open ATT&CK lookupExecution 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-2019-11851 mapping review
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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.sierrawireless.com/company/security/CVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.