Oracle security advisory (AV26-526) – Update 2
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Serial number: AV26-526 Date: May 29, 2026 Updated: July 15, 2026 On May 28, 2026, Oracle published a security advisory to address critical vulnerabilities in the following products: Oracle Communications Unified Assurance - versions 6.1.1 to 7.0.0 Oracle Database Server - versions 23.4.0 to 23.26.2 Oracle E-Business Suite - versions 12.2.3 to 12.2.15 Oracle Hospitality OPERA 5 Property Services - versions 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6 and 5.6.28 Oracle REST Data Services - versions 24.2.0 to 26.1.0 Update 1 Open-source reporting indicates that CVE-2026-46817 is being exploited. Update 2 On July 15, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-46817 to their Known Exploited Vulnerabilities (KEV) Database. The Cyber Centre encourages users and administrators to review the provided web links and perform the suggested mitigations. Oracle Critical Security Patch Update Advisory - May 2026 Oracle Critical Patch Updates, Security Alerts and Bulletins CISA KEV: CVE-2026-46817
CSIRTS triage
- What
- Critical vulnerabilities have been identified in multiple Oracle products.
- Who is affected
- Users of the specified Oracle products and versions are affected.
- Urgency
- Remediation is critical due to the exploitation of CVE-2026-46817.
- Action
- Users should apply the necessary updates immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://cyber.gc.ca/en/alerts-advisories/oracle-security-advisory-av26-526
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-46817Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 96% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-46817 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- highexploitedCISA Adds Two Known Exploited Vulnerabilities to Catalogcisa
- criticalexploitedCVE-2026-46817: Oracle E-Business Suite Improper Privilege Management Vulnerabilitycisa-kev
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