Summary
Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code, cause a denial-of-service, or configuration information may be altered without authentication.
The following versions of Silex Technology SD-330AC and AMC Manager are affected:
- SD-330AC <=1.42 (CVE-2026-32955, CVE-2026-32956, CVE-2026-32957, CVE-2026-32958, CVE-2015-5621, CVE-2026-32959, CVE-2026-32960, CVE-2026-32961, CVE-2026-32962, CVE-2024-24487, CVE-2026-32963, CVE-2026-32964, CVE-2026-32965)
- AMC Manager <=5.0.2 (CVE-2026-32955, CVE-2026-32956, CVE-2026-32957, CVE-2026-32958, CVE-2015-5621, CVE-2026-32959, CVE-2026-32960, CVE-2026-32961, CVE-2026-32962, CVE-2024-24487, CVE-2026-32963, CVE-2026-32964, CVE-2026-32965)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 9.8 | Silex Technology | Silex Technology SD-330AC and AMC Manager | Stack-based Buffer Overflow, Heap-based Buffer Overflow, Missing Authentication for Critical Function, Use of Hard-coded Cryptographic Key, Dependency on Vulnerable Third-Party Component, Use of a Broken or Risky Cryptographic Algorithm, Sensitive Information in Resource Not Removed Before Reuse, Incorrect Privilege Assignment, Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’), Improper Neutralization of CRLF Sequences (‘CRLF Injection’), Initialization of a Resource with an Insecure Default |
Background
- Critical Infrastructure Sectors: Information Technology
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Japan
Vulnerabilities
CVE-2026-32955
A Stack-based Buffer Overflow vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to execute arbitrary code on the device.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-121 Stack-based Buffer Overflow
Metrics
CVE-2026-32956
A Heap-based Buffer Overflow vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to execute arbitrary code on the device.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-122 Heap-based Buffer Overflow
Metrics
CVE-2026-32957
A Missing Authentication for Critical Function vulnerability in Silex Technology SD-330AC and AMC Manager could allow uploads of arbitrary files to the device without authentication.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-306 Missing Authentication for Critical Function
Metrics
CVE-2026-32958
A Use of Hard-coded Cryptographic Key vulnerability in Silex Technology SD-330AC and AMC Manager could cause an administrative user to be directed to apply a fake firmware update.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-321 Use of Hard-coded Cryptographic Key
Metrics
CVE-2015-5621
The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash).
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-1395 Dependency on Vulnerable Third-Party Component
Metrics
CVE-2026-32959
A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to retrieve information via a man-in-the-middle attack.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-327 Use of a Broken or Risky Cryptographic Algorithm
Metrics
CVE-2026-32960
A Sensitive Information in Resource Not Removed Before Reuse vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to send specially crafted packets that may allow the attacker to login to the device.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-226 Sensitive Information in Resource Not Removed Before Reuse
Metrics
CVE-2026-32961
A Heap-based Buffer Overflow vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to send specially crafted packets that may cause a temporary denial-of-service (DoS) condition.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-122 Heap-based Buffer Overflow
Metrics
CVE-2026-32962
A Missing Authentication for Critical Function vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to alter the device configuration without authentication.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-306 Missing Authentication for Critical Function
Metrics
CVE-2024-24487
An issue discovered in Silex Technology DS-600 Firmware v.1.4.1 allows a remote attacker to cause a denial of service via crafted UDP packets using the EXEC REBOOT SYSTEM command.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-266 Incorrect Privilege Assignment
Metrics
CVE-2026-32963
An Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’) vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to trick a user into accessing a special web page and execute arbitrary script on the user’s browser.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-79 Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)
Metrics
CVE-2026-32964
An Improper Neutralization of CRLF Sequences (‘CRLF Injection’) vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker to inject arbitrary entries into the system configuration.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-93 Improper Neutralization of CRLF Sequences (‘CRLF Injection’)
Metrics
CVE-2026-32965
An Initialization of a Resource with an Insecure Default vulnerability in Silex Technology SD-330AC and AMC Manager could allow an attacker using the factory default configuration to configure the device using the null string password.
Affected Products
Silex Technology SD-330AC and AMC Manager
Vendor:
Silex Technology
Product Version:
Silex Technology SD-330AC: <=1.42, Silex Technology AMC Manager: <=5.0.2
Product Status:
known_affected
Relevant CWE: CWE-1188 Initialization of a Resource with an Insecure Default
Metrics
Acknowledgments
- Francesco La Spina of Forescout Technologies reported these vulnerabilities to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.
Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
Locate control system networks and remote devices behind firewalls and isolating them from business networks.
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Do not click web links or open attachments in unsolicited email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
Revision History
- Initial Release Date: 2026-04-21
| Date | Revision | Summary |
|---|---|---|
| 2026-04-21 | 1 | Initial Publication |
