CVE-2026-70855Network attack vector

Data disclosure and modification via undisclosed flaw

Published Aug 18, 2026 · Updated Aug 18, 2026

An undisclosed flaw in Oracle Siebel Self Service 17.0 through 26.6 allows remote attackers to read and modify application data via HTTP. Oracle identifies the Helpdesk/Training component but does not disclose the faulty operation or input handling that enables the compromise. Exploitation requires no authentication but does require another person to interact; a successful attack can expose, create, delete, or modify all accessible application data and can affect other products.

CVSS severity9.3
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An undisclosed flaw in Oracle Siebel Self Service 17.0 through 26.6 allows remote attackers to read and modify application data via HTTP. Oracle identifies the Helpdesk/Training component but does not disclose the faulty operation or input handling that enables the compromise. Exploitation requires no authentication but does require another person to interact; a successful attack can expose, create, delete, or modify all accessible application data and can affect other products.

The record

CVE
CVE-2026-70855
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Oracle Corporation
Product
Siebel Self Service
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=17.0 <=26.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Siebel Self Serviceversion=17.0 <=26.6

Published CVSS scores

9.3Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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