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PatchSiren cyber security CVE debrief

CVE-2026-32955 silex technology, Inc. CVE debrief

CVE-2026-32955 affects Silex Technology SD-330AC and AMC Manager and is described by CISA as a stack-based buffer overflow that could let an attacker execute arbitrary code on the device. CISA published the advisory on 2026-04-21 and lists vendor fixes plus a temporary mitigation to disable HTTP/HTTPS service.

Vendor
silex technology, Inc.
Product
Silex Technology SD-330AC <=1.42 AMC Manager <=5.0.2
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-21
Original CVE updated
2026-04-21
Advisory published
2026-04-21
Advisory updated
2026-04-21

Who should care

Administrators and operators using Silex Technology SD-330AC firmware 1.42 or earlier and AMC Manager 5.0.2 or earlier, especially where the management interface is exposed on networks used for operational or embedded-device administration.

Technical summary

The advisory describes a stack-based buffer overflow in SD-330AC and AMC Manager. CISA’s metadata rates the issue CVSS 3.1 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating network-reachable attack potential with high confidentiality, integrity, and availability impact. The advisory also includes SSVCv2 notation E:N/A:N dated 2026-04-20. Remediation is available in SD-330AC firmware 1.50 or later and AMC Manager 5.1.0 or later; CISA also lists disabling HTTP/HTTPS service as a mitigation for this and related issues.

Defensive priority

High — patch or mitigate immediately.

Recommended defensive actions

  • Upgrade SD-330AC to firmware 1.50 or later.
  • Upgrade AMC Manager to version 5.1.0 or later.
  • If you cannot patch immediately, disable HTTP/HTTPS service as CISA recommends for this advisory’s affected CVEs.
  • Review exposure of device management interfaces and restrict access to trusted administrative networks.
  • Validate whether any deployed devices match the affected version ranges: SD-330AC 1.42 or earlier and AMC Manager 5.0.2 or earlier.

Evidence notes

This debrief is based on the CISA CSAF advisory ICSA-26-111-10 (source item: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-111-10.json) and the linked official references. The advisory states: a stack-based buffer overflow could allow arbitrary code execution on the device; affected versions are SD-330AC <=1.42 and AMC Manager <=5.0.2; fixes are SD-330AC firmware 1.50+ and AMC Manager 5.1.0+; and a mitigation is to disable HTTP/HTTPS service. The CVE and source publication timestamps used here are 2026-04-21T06:00:00.000Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-32955 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-32955

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

  • CVE-2026-32955 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-32955

    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-26-111-10.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-111-10

    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.