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CVE-2026-47040 is an easily exploitable vulnerability in the Oracle Net Services component of Oracle Database Server, specifically identified as affecting Connection Manager. Supported affected versions are Oracle Database Server 19.3 through 19.31, 21.3 through 21.22, and 23.4.0 through 23.26.2. An unauthenticated attacker with network access via Oracle Net can exploit the flaw remotely without user interaction or credentials. Successful exploitation can compromise Oracle Net Services by exposing critical data accessible through the service and by causing the service to hang or crash repeatedly. The available information does not identify the precise vulnerable function or root cause, so a specific CWE cannot be assigned with confidence.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity unauthenticated remote vulnerability in Oracle Net Services that can expose sensitive data and cause denial-of-service conditions by crashing or hanging affected services.
A high-severity unauthenticated vulnerability in Oracle Net Service affecting Oracle Database Server that can allow attackers to access stored data and persistently crash the service.
A remotely exploitable unauthenticated vulnerability affecting Connection Manager in Oracle Net Services within Oracle Database Server.
A critical Oracle Database Server vulnerability affecting Connection Manager in Oracle Net Services that is remotely exploitable without authentication.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.