CVE-2026-32959

Traffic disclosure via constant encryption keystream

Published Apr 20, 2026 · Updated Apr 20, 2026

Broken cryptography in Silex SD-330AC 1.42 and earlier and AMC Manager 5.0.2 and earlier lets man-in-the-middle attackers read traffic. The AMC Manager communications protocol encrypts traffic with a constant keystream, allowing intercepted ciphertext to reveal confidential configuration data. Exploitation requires a position on the same local network between the Windows management host and SD-330AC; no integrity or availability impact is reported.

CVSS severity8.2
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken cryptography in Silex SD-330AC 1.42 and earlier and AMC Manager 5.0.2 and earlier lets man-in-the-middle attackers read traffic. The AMC Manager communications protocol encrypts traffic with a constant keystream, allowing intercepted ciphertext to reveal confidential configuration data. Exploitation requires a position on the same local network between the Windows management host and SD-330AC; no integrity or availability impact is reported.

The record

CVE
CVE-2026-32959
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
Silex Technology
Product
SD-330AC
Classifications
CWE-327, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Ver.1.42 and earlier

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Silex Technology · SD-330ACversion=Ver.1.42 and earlier
Silex Technology · AMC Managerversion=Ver.5.0.2 and earlier

Published CVSS scores

8.2JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9JPCERT/CCCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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