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Oracle Issues Rare Emergency Patch for Critical Pre-Auth RCE in Identity Manager as Second Out-of-Band Fix in Four Months Signals Persistent Middleware Risk

Oracle releases out-of-band patch for CVE-2026-21992, a CVSS 9.8 unauthenticated RCE flaw in Identity Manager and Web Services Manager, just months after a similar vulnerability was actively exploited in the wild.

Cybersecurity Vulnerabilities
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Overview

Oracle has released an emergency out-of-band security patch for CVE-2026-21992, a critical vulnerability in Oracle Identity Manager and Oracle Web Services Manager that allows unauthenticated attackers to achieve remote code execution over HTTP. The flaw carries a CVSS v3.1 base score of 9.8, the highest severity tier, and requires no user interaction or authentication to exploit, according to the National Vulnerability Database entry.

The patch, disclosed on March 19, 2026, marks only the second time Oracle has issued an out-of-band Security Alert for Identity Manager since 2010, underscoring the severity of the flaw. Oracle has averaged roughly two such emergency alerts per year across all products since that time, as noted by BleepingComputer.

What We Know

The vulnerability, classified under CWE-306 (Missing Authentication for Critical Function), affects two Oracle Fusion Middleware products:

  • Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0, in the REST WebServices component
  • Oracle Web Services Manager versions 12.2.1.4.0 and 14.1.2.1.0, in the Web Services Security module

Oracle Identity Manager is widely deployed in enterprises for provisioning, managing, and deprovisioning users, roles, and access rights. Oracle Web Services Manager handles security policies for web service endpoints. A successful exploit of either component grants an attacker full system takeover with complete compromise of confidentiality, integrity, and availability, according to Oracle’s security advisory.

The vulnerability was reported by security researchers Adam Kues and Shubham Shah of Assetnote (now part of Searchlight Cyber), according to BleepingComputer. The same researchers previously identified CVE-2025-61757, a nearly identical pre-authentication RCE in Identity Manager’s REST WebServices component that was patched in October 2025 and subsequently added to CISA’s Known Exploited Vulnerabilities catalog in November 2025 after being exploited in the wild.

Searchlight Cyber described CVE-2025-61757 as “somewhat trivial and easily exploitable” in a technical write-up published the day before CISA flagged it as actively exploited, as reported by BleepingComputer.

What We Don’t Know

Oracle has declined to comment on whether CVE-2026-21992 has been actively exploited in the wild, according to BleepingComputer. At the time of disclosure, no public proof-of-concept exploit code was available.

Oracle has also not confirmed whether CVE-2026-21992 and the earlier CVE-2025-61757 share a common root cause or represent variants of the same underlying authentication bypass. Both affect the REST WebServices component of Identity Manager and both allow unauthenticated remote code execution, but Oracle has treated them as separate issues.

The number of internet-facing Oracle Identity Manager instances potentially exposed to the flaw has not been publicly disclosed by Oracle or independent researchers.

Analysis

The recurrence of a critical pre-authentication RCE in the same component of Oracle Identity Manager within a four-month window raises questions about the depth of Oracle’s internal code audit following CVE-2025-61757. When the earlier flaw was confirmed as a zero-day, it signaled that attackers had already identified Oracle’s identity management stack as a high-value target. A second, structurally similar vulnerability emerging so soon afterward suggests either incomplete remediation or a broader class of authentication gaps in the middleware.

Oracle’s emergency patch program is reserved for vulnerabilities that are either critical or under active exploitation, making it distinct from the company’s quarterly Critical Patch Updates. Oracle has stated that it “strongly recommends that customers apply the updates or mitigations provided by this Security Alert as soon as possible,” as noted in the company’s security blog. However, patches are only available for versions under Premier or Extended Support, meaning organizations running older, unsupported versions may remain exposed indefinitely without upgrading.

The timing of this disclosure also arrives against a backdrop of heightened scrutiny over Oracle’s security posture. Earlier in 2025, a separate incident involving Oracle Cloud’s legacy SSO infrastructure resulted in approximately six million records being offered for sale, prompting investigations by the FBI and CrowdStrike. While unrelated to CVE-2026-21992, the cumulative effect may accelerate enterprise migration planning away from legacy Oracle middleware deployments.