---
id: "CVE-2021-35587"
kind: "vulnerability"
aliases: ["CVE-2021-35587"]
title: "Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: OpenSSO Agent)"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Oracle Fusion Middleware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "oracle access manager", "fixed": [], "affected": "= 11.1.2.3.0", "ecosystem": "vendor"}, {"name": "oracle access manager", "fixed": [], "affected": "= 12.2.1.3.0", "ecosystem": "vendor"}, {"name": "oracle access manager", "fixed": [], "affected": "= 12.2.1.4.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "oracle-access-manager", "oracle-fusion-middleware", "self-hosted", "vendor"]
not_affected_if: ["no-oracle-access-manager"]
published_at: "2022-01-19T12:15:09+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-35587", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-35587", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: OpenSSO Agent)

Oracle Fusion Middleware Access Manager has an unspecified flaw that lets an unauthenticated attacker over HTTP take over the product. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Oracle Fusion Middleware affected ? fixed ?
- vendor:oracle access manager affected = 11.1.2.3.0 fixed ?
- vendor:oracle access manager affected = 12.2.1.3.0 fixed ?
- vendor:oracle access manager affected = 12.2.1.4.0 fixed ?

## How to check

Identify whether Oracle Access Manager is deployed and which version runs; the sources do not give affected version ranges.

## Fix

Apply Oracle's security updates for Oracle Fusion Middleware per vendor instructions (CISA required action); the specific patch or version is unknown from the sources.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-35587
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-35587

## From the sources

Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: OpenSSO Agent). Supported versions that are affected are 11.1.2.3.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Access Manager. Successful attacks of this vulnerability can result in takeover of Oracle Access Manager. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_