CVE-2026-32956
Published: 20 April 2026
Summary
CVE-2026-32956 is a critical-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Silextechnology Sd-330Ac Firmware. Its CVSS base score is 9.3 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 40.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-32956 is a heap-based buffer overflow vulnerability (CWE-122) affecting the SD-330AC and AMC Manager products provided by silex technology, Inc. The flaw occurs in the processing of redirect URLs, which can lead to arbitrary code execution on the device. Published on 2026-04-20, it has a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its high impact on confidentiality, integrity, and availability.
The vulnerability can be exploited remotely over the network by unauthenticated attackers with no privileges required and no user interaction needed. Attackers can send specially crafted redirect URLs to trigger the buffer overflow, achieving arbitrary code execution on the affected device, potentially leading to full compromise.
Advisories detailing the issue and mitigation are available from the Japan Vulnerability Notes (JVN) at https://jvn.jp/en/vu/JVNVU94271449/ and silex technology at https://www.silex.jp/support/security-advisories/2026-001 and https://www.silex.jp/support/security-advisories/en/2026-001.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-23749
Vulnerability details
SD-330AC and AMC Manager provided by silex technology, Inc. contain a heap-based buffer overflow vulnerability in processing the redirect URLs. Arbitrary code may be executed on the device.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated heap buffer overflow in redirect URL processing of a network-exposed device/management application directly enables initial access via exploitation of a public-facing application (T1190), resulting in arbitrary code execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the heap-based buffer overflow vulnerability by identifying, patching, and deploying fixes for the affected SD-330AC and AMC Manager products.
Validates redirect URL inputs to prevent specially crafted inputs from triggering the heap buffer overflow leading to arbitrary code execution.
Implements memory protections such as ASLR and DEP to block arbitrary code execution even if the heap buffer overflow occurs.