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Known exploited · Oracle

CVE-2020-2555: Oracle Multiple Products Remote Code Execution Vulnerability

What it is

Multiple Oracle products contain a remote code execution vulnerability that allows an unauthenticated attacker with network access via T3 or HTTP to takeover the affected system. Impacted Oracle products: Oracle Coherence in Fusion Middleware, Oracle Utilities Framework, Oracle Retail Assortment Planning, Oracle Commerce, Oracle Communications Diameter Signaling Router (DSR).

Added November 3, 2021Due May 3, 2022CISA KEV catalog 2026.10.01

Vendor
Oracle
Product
Multiple Products
Added to KEV
November 3, 2021
CISA due date
May 3, 2022
Ransomware use
Unknown

What CISA requires

Apply updates per vendor instructions.

Forensic triage

No

What to do now

  1. Find every instance of Multiple Products you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before May 3, 2022 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
  4. Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops Java deserialization payloads.

References

CVE-2020-2555 in the National Vulnerability Database

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.