Security readout for executives and security teams
CVE-2020-2555 is a critical Oracle Coherence vulnerability that can let an unauthenticated network attacker take over affected systems through T3 access. For executives, this is urgent because compromise can affect confidentiality, integrity, and availability. CISA lists it as known exploited, so exposed or unpatched environments should be treated as high-priority risk. Exposure is most likely where affected Oracle Coherence or bundled Oracle products are reachable over T3. The bundle also lists Oracle WebCenter Portal and Oracle Utilities Framework versions as affected product contexts. Internet-facing or broadly reachable middleware tiers carry the highest business risk. Treat this as an urgent remediation item for any reachable Oracle middleware. KEV status means real-world exploitation has occurred, and the vulnerability can enable full takeover. Patch validation and T3 exposure reduction should be tracked to closure. Mitigation focus: Apply Oracle Critical Patch Update guidance for CVE-2020-2555.; Prioritize systems running the affected Coherence versions listed in the CVE.; Limit T3 exposure to trusted network paths where operationally possible..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookupCVE-2020-2555 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpujul2020.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujan2020.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuoct2020.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujan2021.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2021.htmlCVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2555CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.