CVE-2026-16480Network attack vector

Catalog data modification via bypassed authority checks

Published Aug 12, 2026 · Updated Aug 12, 2026

Improper authorization in IBM Db2 Server 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 allows remote authenticated users to modify catalog data. A certain command accepts a non-privileged request without enforcing the required authority checks before modifying catalog records. Successful exploitation requires a non-privileged Db2 account, and IBM has not documented effects beyond catalog-data modification and limited data access.

CVSS severity4.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in IBM Db2 Server 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 allows remote authenticated users to modify catalog data. A certain command accepts a non-privileged request without enforcing the required authority checks before modifying catalog records. Successful exploitation requires a non-privileged Db2 account, and IBM has not documented effects beyond catalog-data modification and limited data access.

The record

CVE
CVE-2026-16480
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
IBM
Product
Db2
Classifications
CWE-602, T1565.001
Attack vector
network
Privileges
authenticated

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=11.5.0 <=11.5.9
  2. Affected versionversion=12.1.0 <=12.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Db2version=11.5.0 <=11.5.9; version=12.1.0 <=12.1.5

Published CVSS scores

4.3IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-602Client-Side Enforcement of Server-Side Security
T1565.001Stored Data Manipulation

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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