CVE-2026-17485Network attack vector

Sensitive-information disclosure and service interruption via SST underflow

Published Aug 12, 2026 · Updated Aug 12, 2026

Out-of-bounds read in System Service Tools in IBMi 7.3 through 7.6 allows remote attackers to read sensitive data and interrupt service. An integer underflow within SST drives the out-of-bounds read; the affected routine, input field, and request path remain undisclosed. Network access is required, with no authentication or user interaction, and the interruption is not classified as a hang, crash, or restart.

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

What happened

Out-of-bounds read in System Service Tools in IBMi 7.3 through 7.6 allows remote attackers to read sensitive data and interrupt service. An integer underflow within SST drives the out-of-bounds read; the affected routine, input field, and request path remain undisclosed. Network access is required, with no authentication or user interaction, and the interruption is not classified as a hang, crash, or restart.

The record

CVE
CVE-2026-17485
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
IBM
Product
IBM i
Classifications
CWE-191, CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.2IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-125Out-of-bounds Read
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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