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Known exploited vulnerability · CISA KEV

CVE-2020-14644: Oracle WebLogic Server Remote Code Execution Vulnerability

Oracle WebLogic Server, a product within the Fusion Middleware suite, contains a deserialization vulnerability. Unauthenticated attackers with network access via T3 or IIOP can exploit this vulnerability to achieve remote code execution.

CVE-2020-14644

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2024-09-18: attackers are using it right now.

CISA KEV
Listed
Added 2024-09-18 · federal fix-by 2024-10-09
EPSS (30 days)
95%
Higher than 99.9% of CVEs · 2026-11-01
CVSS
No score

What CISA says

Oracle WebLogic Server Remote Code Execution Vulnerability

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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How to check if you are exposed to CVE-2020-14644

  1. Find every Oracle WebLogic Server system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
  2. Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
  3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2020-14644.

US federal agencies had to fix this by 2024-10-09. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Timeline

  1. · Added to CISA's Known Exploited Vulnerabilities catalog
  2. · Fix-by date for US federal agencies, passed 753 days ago

Vendor advisories and fixes

More exploited Oracle vulnerabilities

CISA lists 46 exploited Oracle vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

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