Security readout for executives and security teams
Plain-English summary
CVE-2019-12328 lets a logged-in attacker on the same network run operating-system commands through the Atcom A10W VoIP phone web interface. The affected firmware named in the sources is 2.6.1a2421. Business urgency is highest where these phones are still deployed on reachable voice or office networks.
Executive priority
Treat as urgent for environments with Atcom A10W phones. A compromised phone can become an internal foothold or disrupt voice services. If affected devices remain in service, prioritize isolation, access restriction, and supported remediation or replacement.
Technical view
The issue is command injection caused by missing input validation in the remote phonebook configuration URI of the Atcom A10W web interface. A low-privileged authenticated attacker on the same network can use shell metacharacters in a POST request to trigger OS commands. CVSS 3.0 is 9.0 with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to organizations still using Atcom A10W phones with firmware 2.6.1a2421 and reachable web management interfaces. The CVSS vector and description indicate same-network access and authentication are required, not unauthenticated internet exploitation.
Exploitation context
The provided bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitability is still serious because only low privileges, no user interaction, and same-network access are required once the phone web interface is reachable.
Researcher notes
The record names a specific firmware and attack surface but provides limited product metadata in the affected field. Avoid broad assumptions beyond Atcom A10W firmware 2.6.1a2421. The public description supports command injection, authenticated access, and same-network reachability requirements.
Mitigation direction
- Check Atcom or maintainer guidance for fixed firmware or replacement direction.
- Restrict phone web management access to dedicated administration hosts only.
- Segment VoIP devices from user workstations and untrusted networks.
- Remove or rotate unnecessary low-privileged web accounts on affected phones.
- Prioritize replacement if no supported patched firmware is available.
Validation and detection
- Inventory Atcom A10W phones and record firmware versions.
- Confirm whether firmware 2.6.1a2421 is present in production.
- Map which networks can reach the phone web interface.
- Review web management accounts for low-privileged access exposure.
- Check available vendor guidance before planning 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
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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-2019-12328 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:C/UI:N
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:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:C/UI:N2.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9CriticalVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:C/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_Atcom_A10W.pdfCVE 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.