CVE-2026-21997Network attack vector

Authenticated data manipulation and partial disclosure

Published Apr 21, 2026 · Updated Apr 21, 2026

Improper access control in Common Core in Oracle Life Sciences Empirica Signal 9.2.1 through 9.2.3 allows remote authenticated users to alter data. Oracle has not published the faulty operation or request path within Common Core that permits the unauthorized access. A low-privileged account and HTTP network access are required; exploitation permits reading a subset of accessible data and creating, deleting, or modifying critical or all accessible data across product boundaries.

CVSS severity8.5
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in Common Core in Oracle Life Sciences Empirica Signal 9.2.1 through 9.2.3 allows remote authenticated users to alter data. Oracle has not published the faulty operation or request path within Common Core that permits the unauthorized access. A low-privileged account and HTTP network access are required; exploitation permits reading a subset of accessible data and creating, deleting, or modifying critical or all accessible data across product boundaries.

The record

CVE
CVE-2026-21997
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Oracle Corporation
Product
Oracle Life Sciences Empirica Signal
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.2.1 <=9.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · Oracle Life Sciences Empirica Signalversion=9.2.1 <=9.2.3

Published CVSS scores

8.5Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/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 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-284Improper Access Control
T1190Exploit Public-Facing Application

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo