Oracle Database Net Service critical remote code execution flaws
Multiple critical vulnerabilities in Oracle Database Server Net Service allow remote code execution and denial of service, affecting versions 23.4.0 through 23.26.2.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 3 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
The French CERT (CERT-FR) has disclosed multiple vulnerabilities in Oracle Database Server's Net Service component affecting versions 23.4.0 through 23.26.2. The vulnerabilities enable remote attackers to execute arbitrary code and trigger denial of service conditions without prior authentication.
Three CVEs have been assigned to these flaws: CVE-2026-46833, CVE-2026-46834, and CVE-2026-46835. Oracle has released patches as part of their Critical Patch Update for May 2026. The Net Service component is a core networking layer for Oracle Database, making these vulnerabilities particularly significant for enterprises running affected versions.
Organizations running Oracle Database Server versions in the affected range should prioritize patching according to Oracle's May 2026 security bulletin. The combination of remote code execution and denial of service capabilities without authentication presents a severe risk to database infrastructure.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0662
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