PatchSiren cyber security CVE debrief

CVE-2026-32955 Raw 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: Raw
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.

Official resources

Publicly disclosed by CISA as ICSA-26-111-10 on 2026-04-21T06:00:00.000Z, with the CVE record published the same day. The advisory includes SSVCv2 notation E:N/A:N dated 2026-04-20T06:00:00.000Z.