CVE Record
[ HIGH ]CVE-2023-21839
Oracle WebLogic Server Unspecified Vulnerability
Oracle WebLogic Server contains an unspecified vulnerability that allows an unauthenticated attacker with network access via T3, IIOP, to compromise Oracle WebLogic Server.
- Vendor
- Oracle
- Product
- WebLogic Server
- CVSS
- 7.5
- EPSS (exploit probability)
- 99.9%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2023-21839 being exploited?
Yes. CISA added CVE-2023-21839 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 99.9% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Oracle WebLogic Server CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-21962 Oracle WebLogic/HTTP Server unauthenticated data access via HTTPwrite-up | [ CRITICAL ] | 10.0 | 73.2% | |
| CVE-2024-21182 Oracle WebLogic Server Unspecified Vulnerability | [ HIGH ] | 7.5 | 74.2% | |
| CVE-2020-2883 Oracle WebLogic Server Unspecified Vulnerability | [ CRITICAL ] | 9.8 | 94.6% | |
| CVE-2020-14644 Oracle WebLogic Server Remote Code Execution Vulnerability | [ CRITICAL ] | 9.8 | 94.5% | |
| CVE-2017-3506 Oracle WebLogic Server OS Command Injection Vulnerability | [ HIGH ] | 7.4 | 96.0% | |
| CVE-2018-2628 Oracle WebLogic Server Unspecified Vulnerability | [ CRITICAL ] | 9.8 | 100.0% | |
| CVE-2017-10271 Oracle Corporation WebLogic Server Remote Code Execution Vulnerabilityransomware use | [ HIGH ] | 7.5 | 100.0% | |
| CVE-2019-2725 Oracle WebLogic Server, Injectionransomware use | [ CRITICAL ] | 9.8 | 100.0% |