CVE-2021-2018

Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 18c and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Advanced Networking Option, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Advanced Networking Option. Note: CVE-2021-2018 affects Windows platform only. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).

Published: 2021-01-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-2018 is rated Moderate Risk (60.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.34%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-2018

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 1.41% 1.34% -0.07%
2 2025-11-18 1.34% 1.41% +0.07%
3 2025-09-24 — 1.34% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-2018

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.3 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 6.0 [email protected]
5.1 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 6.4 [email protected]

Weakness enumeration for CVE-2021-2018

Affected software / configurations for CVE-2021-2018

Vendor Product Version Raw CPE
oracle advanced_networking_option 18c cpe:2.3:a:oracle:advanced_networking_option:18c:*:*:*:*:*:*:.
oracle advanced_networking_option 19c cpe:2.3:a:oracle:advanced_networking_option:19c:*:*:*:*:*:*:.
oracle adaptive_access_manager 11.1.2.3.0 cpe:2.3:a:oracle:adaptive_access_manager:11.1.2.3.0:*:*:*:*:*:*:*
oracle data_integrator 11.1.1.9.0 cpe:2.3:a:oracle:data_integrator:11.1.1.9.0:*:*:*:*:*:*:*
oracle data_integrator 12.2.1.3.0 cpe:2.3:a:oracle:data_integrator:12.2.1.3.0:*:*:*:*:*:*:*
oracle data_integrator 12.2.1.4.0 cpe:2.3:a:oracle:data_integrator:12.2.1.4.0:*:*:*:*:*:*:*
oracle enterprise_manager_for_fusion_applications 13.3.0.0 cpe:2.3:a:oracle:enterprise_manager_for_fusion_applications:13.3.0.0:*:*:*:*:*:*:*
oracle hospitality_simphony 18.2.7.2 cpe:2.3:a:oracle:hospitality_simphony:18.2.7.2:*:*:*:*:*:*:*
oracle hospitality_simphony 19.1.3 cpe:2.3:a:oracle:hospitality_simphony:19.1.3:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.3.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*

References for CVE-2021-2018

cvelogic Threat Intelligence