Exploited CVEs / Oracle / CVE-2021-35587

CVE-2021-35587

Oracle Fusion Middleware Unspecified Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-12-19 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Oracle Critical Patch Updates, linked below.

Risk summary

CriticalCISA KEV

9.8

CVSS base

96%

EPSS exploit probability

Critical

Severity

2022-11-28

Added to KEV

2022-12-19 (past due)

CISA due date

Actively exploited Oracle Fusion Middleware vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2022-11-28.

Senserva AI read on CVE-2021-35587 CISA required action Official fix for CVE-2021-35587 Admin questions

Senserva AI Opinion for CVE-2021-35587

Oracle Access Manager, the Fusion Middleware component that provides single sign-on for enterprise applications, can be taken over by an unauthenticated attacker with HTTP access: Critical Severity at CVSS 9.8 and a 96% EPSS score (KEV, 2022-11-28). Compromising the SSO layer hands over authentication for every application behind it, making this among the highest-leverage bugs in the middleware world. Internet-reachable OAM login endpoints were mass-scanned after the exploit became public.

Do this: Patch Oracle Access Manager without delay and review its logs for exploitation attempts predating the patch, since takeover here affects all downstream apps.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2021-35587

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2021-35587, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2021-35587.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2021-35587: Oracle Fusion Middleware Unspecified Vulnerability
- Affected: Oracle Fusion Middleware
- Severity: Critical, CVSS 9.8; EPSS 30-day exploitation probability 96%
- Added to CISA KEV: 2022-11-28; federal remediation due 2022-12-19
- Ransomware-linked: no
- CISA required action: Apply updates per vendor instructions.
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch now

Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.

The fix ships from the vendor: Oracle Critical Patch Updates.

Do this now: Federal remediation deadline 2022-12-19; treat it as your outer bound. Patch now and verify deployment on every exposed device.

Updated August 14, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Full tracking and change history for CVE-2021-35587

Published: 2022-11-28
Last revised: 2022-11-28
Changes tracked: 1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Senserva Watchevery change we have recorded for this one

What changed, and when

2022-11-28 added to the CISA KEV catalog by CISA
2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 96.3%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal (BOD 22-01) remediation due date: 2022-12-19 (past due).

Apply updates per vendor instructions.

Official fix for CVE-2021-35587

The authoritative fix and affected-version list are published by the vendor. Find the Fusion Middleware advisory on Oracle Critical Patch Updates.

Oracle Critical Patch Updates CISA KEV entry

Common questions about CVE-2021-35587

Is CVE-2021-35587 actively exploited?

Yes. CVE-2021-35587 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-11-28, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 96%.

What is the CISA deadline and required action for CVE-2021-35587?

CISA set the federal (BOD 22-01) remediation due date at 2022-12-19, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.

What fixes CVE-2021-35587?

The authoritative fix is in the vendor advisory: see Oracle Critical Patch Updates for the patched Fusion Middleware versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2021-35587?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2021-35587's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).

Scope and sources

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All Oracle exploited CVEs on one page: Oracle vulnerabilities actively exploited.
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.