CVE-2021-35617Network attack vector

Unauthenticated remote server takeover

Published Oct 20, 2021 · Updated Sep 25, 2024

An unspecified flaw in WebLogic Server 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 allows remote attackers to take over the server via IIOP. Oracle has not disclosed the faulty operation or input handling within the Coherence Container, so the underlying mechanism is not public. Network access to an IIOP listener is sufficient; exploitation requires no authentication or user interaction and grants control of WebLogic Server.

CVSS severity9.8
Critical
EPSS probability2.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An unspecified flaw in WebLogic Server 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 allows remote attackers to take over the server via IIOP. Oracle has not disclosed the faulty operation or input handling within the Coherence Container, so the underlying mechanism is not public. Network access to an IIOP listener is sufficient; exploitation requires no authentication or user interaction and grants control of WebLogic Server.

The record

CVE
CVE-2021-35617
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
Oracle WebLogic Server
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record 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=12.1.3.0.0
  2. Affected versionversion=12.2.1.3.0
  3. Affected versionversion=12.2.1.4.0
  4. Affected versionversion=14.1.1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle WebLogic Serverversion=12.1.3.0.0; version=12.2.1.3.0; version=12.2.1.4.0; version=14.1.1.0.0

Published CVSS scores

9.8Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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Your stack

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