CVE-2021-35587Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via deserialized requester object

Published Jan 19, 2022 · Updated Oct 21, 2025

Deserialization in Oracle Access Manager 11.1.2.3.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to execute code via HTTP. The OpenSSO Agent session service decodes the requester value in an authIdentifier and deserializes its embedded object without authentication. Network access to the OAM HTTP endpoint is sufficient to execute commands as the Oracle service account and take over the deployment.

CVSS severity9.8
Critical
EPSS probability96.28%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Oracle Access Manager 11.1.2.3.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to execute code via HTTP. The OpenSSO Agent session service decodes the requester value in an authIdentifier and deserializes its embedded object without authentication. Network access to the OAM HTTP endpoint is sufficient to execute commands as the Oracle service account and take over the deployment.

The record

CVE
CVE-2021-35587
Published
Jan 19, 2022
Updated
Oct 21, 2025
Vendor
Oracle Corporation
Product
Oracle Access Manager
Classifications
CWE-502, CWE-790, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record 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=11.1.2.3.0
  2. Affected versionversion=12.2.1.3.0
  3. Affected versionversion=12.2.1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Access Managerversion=11.1.2.3.0; version=12.2.1.3.0; version=12.2.1.4.0

Published CVSS scores

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

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 IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20261
Sep 23, 2026Unavailable
Sep 24, 2026Unavailable
Sep 25, 20262
Sep 26, 20261
Sep 27, 20262
Sep 28, 20261
Latest reporting daySep 28, 2026
Latest daily unique IPs1
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-790Improper Filtering of Special Elements
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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