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PatchSiren cyber security CVE debrief

CVE-2026-32961 silex technology, Inc. CVE debrief

CVE-2026-32961 is a network-triggerable heap-based buffer overflow affecting Silex Technology SD-330AC firmware versions 1.42 and earlier, and AMC Manager versions 5.0.2 and earlier. According to the CISA CSAF advisory, specially crafted packets can trigger a temporary denial-of-service condition. The issue is rated CVSS 5.3 (medium) and the source advisory provides fixed versions for both products.

Vendor
silex technology, Inc.
Product
Silex Technology SD-330AC <=1.42 AMC Manager <=5.0.2
CVSS
MEDIUM 5.3
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

Organizations using Silex Technology SD-330AC devices or AMC Manager, especially OT/ICS operators and administrators responsible for network-facing management services running firmware 1.42 or earlier or AMC Manager 5.0.2 or earlier.

Technical summary

The advisory describes a heap-based buffer overflow in packet handling for Silex Technology SD-330AC and AMC Manager. The published CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) indicates network attackability, low complexity, no privileges required, and an availability-only impact. The source remediation guidance lists SD-330AC firmware Ver 1.50 or later and AMC Manager Ver. 5.1.0 or later as fixes.

Defensive priority

Medium priority: patch promptly for any exposed or production deployment because the flaw is network-reachable and can disrupt availability, but the disclosed impact is limited to temporary denial of service.

Recommended defensive actions

  • Upgrade SD-330AC firmware to Ver 1.50 or later.
  • Upgrade AMC Manager to Ver. 5.1.0 or later.
  • Inventory deployments to identify systems running SD-330AC firmware 1.42 or earlier or AMC Manager 5.0.2 or earlier.
  • Limit exposure of device management interfaces to trusted networks until remediation is complete.
  • Monitor affected environments for availability degradation or unexpected service interruptions.
  • Review the linked CISA, Silex Technology, and JPCERT/CC advisories for product-specific remediation guidance.

Evidence notes

All claims above are grounded in the supplied CISA CSAF advisory for ICSA-26-111-10 and its published remediation entries. The advisory states: a heap-based buffer overflow could allow specially crafted packets to cause a temporary denial-of-service condition; affected versions are SD-330AC <=1.42 and AMC Manager <=5.0.2; fixed versions are SD-330AC firmware 1.50+ and AMC Manager 5.1.0+. The CVSS vector supplied in the source is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L, supporting a network-reachable availability issue. Publication and modification timestamps in the source are both 2026-04-21T06:00:00Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-32961 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-32961

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

  • CVE-2026-32961 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-32961

    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.