Loading vulnerability…
CVE-2026-83349 is an easily exploitable denial-of-service vulnerability in the Oracle Net Services component of Oracle Database Server. A remote unauthenticated attacker can send network traffic through Oracle Net that causes Oracle Net Services to hang or repeatedly crash. Affected supported Oracle Database Server versions are 19.3 through 19.32, 21.3 through 21.23, and 23.4.0 through 23.26.3.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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 vulnerability in Oracle Database Server referenced by the September 15, 2026 patch publication.
An unauthenticated, network-accessible denial-of-service vulnerability in Oracle Net Services within Oracle Database Server. An attacker can cause the service to hang or repeatedly crash, resulting in complete availability loss. The stated CVSS v3.1 score is 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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.