CVE-2026-84058

Service interruption via TDS PRELOGIN buffer overrun

Published Oct 8, 2026 · Updated Oct 8, 2026

Buffer overrun in IBM Guardium Data Protection's TDS PRELOGIN decoder allows remote attackers to interrupt Collector service via crafted packets. In versions 12.0, 12.1, and 12.2, decoding a crafted Microsoft SQL Server PRELOGIN packet overruns a buffer; the precise faulty operation is not available in the retrieved public material. The packet must reach a network monitored by the Collector; the supplied record identifies code execution as a potential consequence but does not specify whether service interruption is a hang or crash.

CVSS severityUnavailable
Unscored
EPSS probability0.37%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overrun in IBM Guardium Data Protection's TDS PRELOGIN decoder allows remote attackers to interrupt Collector service via crafted packets. In versions 12.0, 12.1, and 12.2, decoding a crafted Microsoft SQL Server PRELOGIN packet overruns a buffer; the precise faulty operation is not available in the retrieved public material. The packet must reach a network monitored by the Collector; the supplied record identifies code execution as a potential consequence but does not specify whether service interruption is a hang or crash.

The record

CVE
CVE-2026-84058
Published
Oct 8, 2026
Updated
Oct 8, 2026
Vendor
IBM
Product
Guardium Data Protection
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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=12.0
  2. Affected versionversion=12.1
  3. Affected versionversion=12.2

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

IBM · Guardium Data Protectionversion=12.0; version=12.1; version=12.2

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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