CVE-2026-16693

Authenticated key disclosure via hardcoded obfuscation constants

Published Sep 4, 2026 · Updated Sep 4, 2026

Cryptographic weakness in IBM's DCM component in releases 7.3 through 7.6 allows remote authenticated users to obtain sensitive information. DCM protects encryption keys with hardcoded cryptographic constants, making the obfuscation reproducible rather than secret. IBM does not identify the affected routine or key store; the published prose describes remote authenticated access, while the CVSS assessment requires local high privileges.

CVSS severity4.4
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic weakness in IBM's DCM component in releases 7.3 through 7.6 allows remote authenticated users to obtain sensitive information. DCM protects encryption keys with hardcoded cryptographic constants, making the obfuscation reproducible rather than secret. IBM does not identify the affected routine or key store; the published prose describes remote authenticated access, while the CVSS assessment requires local high privileges.

The record

CVE
CVE-2026-16693
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
IBM i
Classifications
CWE-327, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=7.3
  2. Affected versionversion=7.4
  3. Affected versionversion=7.5
  4. Affected versionversion=7.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

IBM · IBM iversion=7.3; version=7.4; version=7.5; version=7.6

Published CVSS scores

4.4IBMCVSS:3.1/AV:L/AC:L/PR:H/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.

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No observations available

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

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1005Data from Local System

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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