CVE-2025-30733Public exploitNetwork attack vector

Remote memory disclosure via TCPS version response

Published Apr 15, 2025 · Updated May 19, 2025

Information disclosure in Oracle Database Server allows remote attackers to read RDBMS Listener memory through Oracle Net. A TCPS listener with LOCAL_OS_AUTHENTICATION set to OFF appends uninitialized process memory to an unauthenticated version-command response instead of ending after the expected banners. Versions 19.3 through 19.26, 21.3 through 21.17, and 23.4 through 23.7 are affected; exploitation requires that nondefault setting and human interaction, and exposes connected-client data and host environment variables.

CVSS severity6.5
Medium
EPSS probability0.40%
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

Information disclosure in Oracle Database Server allows remote attackers to read RDBMS Listener memory through Oracle Net. A TCPS listener with LOCAL_OS_AUTHENTICATION set to OFF appends uninitialized process memory to an unauthenticated version-command response instead of ending after the expected banners. Versions 19.3 through 19.26, 21.3 through 21.17, and 23.4 through 23.7 are affected; exploitation requires that nondefault setting and human interaction, and exposes connected-client data and host environment variables.

The record

CVE
CVE-2025-30733
Published
Apr 15, 2025
Updated
May 19, 2025
Vendor
Oracle Corporation
Product
Oracle Database
Classifications
CWE-287, T1082
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 19, 2025Record 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=19.3 <=19.26
  2. Affected versionversion=21.3 <=21.17
  3. Affected versionversion=23.4 <=23.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Databaseversion=19.3 <=19.26; version=21.3 <=21.17; version=23.4 <=23.7

Published CVSS scores

6.5Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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 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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1082System Information Discovery

Public exploit references

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