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PatchSiren cyber security CVE debrief

CVE-2026-2417 Pharos Controls CVE debrief

CVE-2026-2417 is a critical authentication-bypass issue affecting Pharos Controls Mosaic Show Controller firmware version 2.15.3. According to the CISA advisory published on 2026-03-24, an unauthenticated attacker could bypass authentication and execute arbitrary commands with root privileges. Pharos Controls recommends upgrading to Mosaic Show Controller version 2.16 or later. The provided enrichment does not indicate a KEV listing or known ransomware campaign use.

Vendor
Pharos Controls
Product
Mosaic Show Controller Firmware
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-24
Original CVE updated
2026-03-24
Advisory published
2026-03-24
Advisory updated
2026-03-24

Who should care

Organizations operating Pharos Controls Mosaic Show Controller firmware 2.15.3, especially teams responsible for OT/ICS environments, show-control deployments, device administration, and patch management.

Technical summary

The advisory describes a Missing Authentication for Critical Function weakness in Mosaic Show Controller firmware 2.15.3. The supplied CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) reflects a network-reachable, no-privileges, no-user-interaction path to full confidentiality, integrity, and availability impact. The practical result described by the source is unauthenticated execution of arbitrary commands with root privileges.

Defensive priority

Immediate. The issue is rated CVSS 9.8 Critical and the source indicates a direct path from unauthenticated access to root-level command execution. Upgrade as soon as operationally feasible.

Recommended defensive actions

  • Upgrade Mosaic Show Controller to version 2.16 or later, as recommended by Pharos Controls.
  • Inventory all deployments running firmware 2.15.3 and confirm exposure paths, especially any network-reachable management interfaces.
  • Restrict administrative and management access to trusted networks only until remediation is complete.
  • Monitor affected systems for unauthorized authentication bypass attempts or unexpected command execution indicators.
  • Validate that backup and recovery procedures are available before applying firmware updates in operational environments.

Evidence notes

All claims in this debrief are drawn from the supplied CISA CSAF advisory data and the provided CVE metadata. The source states: missing authentication for critical function in Pharos Controls Mosaic Show Controller firmware 2.15.3, unauthenticated attacker, arbitrary commands, and root privileges. The remediation listed by the source is upgrade to version 2.16 or later. The advisory publication date used here is 2026-03-24, matching the supplied CVE and source timestamps. No KEV listing is indicated in the provided enrichment.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-2417 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-2417

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-2417 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-2417

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-083-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-083-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.