VDB-204383 · CVE-2021-23926 · Nessus 296368

Oracle Middleware Common Libraries and Tools 12.2.1.3.0/12.2.1.4.0 Thirdparty Patch xml entity expansion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.9	$5k-$25k	0.00

Summaryinfo

A vulnerability marked as very critical has been reported in Oracle Middleware Common Libraries and Tools 12.2.1.3.0/12.2.1.4.0. This vulnerability affects unknown code of the component Thirdparty Patch. The manipulation leads to an unknown weakness. This vulnerability is listed as CVE-2021-23926. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Oracle Middleware Common Libraries and Tools 12.2.1.3.0/12.2.1.4.0 (Middleware). This issue affects an unknown code of the component Thirdparty Patch. Using CWE to declare the problem leads to CWE-776. The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. Impacted is confidentiality, and availability.

The weakness was presented 07/19/2022 as Oracle Critical Patch Update Advisory - July 2022. It is possible to read the advisory at oracle.com. The identification of this vulnerability is CVE-2021-23926. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/25/2026).

We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 296368 (Oracle Business Intelligence Enterprise Edition (OAS 8.2) (January 2026 CPU)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (296368). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Middleware

Vendor

Oracle

Name

Middleware Common Libraries and Tools

Version

License

commercial

Website

Vendor: https://www.oracle.com

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml entity expansion
CWE: CWE-776
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 296368
Nessus Name: Oracle Business Intelligence Enterprise Edition (OAS 8.2) (January 2026 CPU)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

01/12/2021 🔍
07/19/2022 +552 days 🔍
07/19/2022 +0 days 🔍
07/20/2022 +1 days 🔍
01/25/2026 +1285 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - July 2022
Status: Confirmed

CVE: CVE-2021-23926 (🔍)
GCVE (CVE): GCVE-0-2021-23926
GCVE (VulDB): GCVE-100-204383

Entryinfo

Created: 07/20/2022 08:16
Updated: 01/25/2026 15:48
Changes: 07/20/2022 08:16 (39), 08/13/2022 14:15 (2), 08/13/2022 14:18 (19), 01/25/2026 15:48 (16)
Complete: 🔍
Cache ID: 216::103