Loading vulnerability…
CVE-2026-91665 is a critical vulnerability in the Security component of Oracle Essbase affecting supported version 21.8.3.0.0. An unauthenticated attacker with TCP network access can exploit the vulnerability with low attack complexity and no user interaction to take over Oracle Essbase. The vulnerability has a CVSS 3.1 base score of 9.8 and vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The underlying weakness and vulnerable function are not specified.
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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows an unauthenticated attacker with TCP network access to take over Oracle Essbase. It requires no user interaction and has a CVSS 3.1 score of 9.8, with high confidentiality, integrity, and availability impacts.
A critical vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows an unauthenticated attacker with TCP network access to take over Oracle Essbase. The CVSS 3.1 score is 9.8, with high confidentiality, integrity, and availability impacts and no user interaction required.
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.