CyberSecBulletin
CVE-2026-21932NVD status: Modified

Oracle Java SE: Improper Validation of Specified Type of Input

Published Updated By the CyberSecBulletin desk

CVE-2026-21932 is a high-severity improper validation of specified type of input vulnerability in Oracle Java SE from Oracle, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected Oracle Java SE versions: 8u471; 8u471-b50; 8u471-perf, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.53% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update SIMATIC CN 4100 to V5.0 or a later version.
  2. Read the advisory on oracle.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
  4. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
OracleOracle Java SE8u471; 8u471-b50; 8u471-perf; 11.0.29; 17.0.17; 21.0.9; 25.0.1Not stated
OracleOracle GraalVM for JDK17.0.17; 21.0.9Not stated
OracleOracle GraalVM Enterprise Edition21.3.16Not stated
Red HatOPENJDK ELS 11.0.30Not specified in the recordNot stated
Red HatRed Hat Build of OpenJDK 17.0.18Not specified in the recordNot stated
Red HatRed Hat Build of OpenJDK 21.0.10Not specified in the recordNot stated
Red HatRed Hat Build of OpenJDK 8u482Not specified in the recordNot stated
Red HatTemurin Build of OpenJDK 25.0.2Not specified in the recordNot stated
Red HatRed Hat build of OpenJDK 11 ELSNot specified in the recordNot stated
Red HatRed Hat build of OpenJDK 17Not specified in the recordNot stated
Red HatRed Hat build of OpenJDK 1.8Not specified in the recordNot stated
Red HatRed Hat build of OpenJDK 21Not specified in the recordNot stated
Red HatRed Hat build of OpenJDK 25Not specified in the recordNot stated
Red HatRed Hat Enterprise Linux 10Not specified in the recordNot stated
Red HatRed Hat Enterprise Linux 6Not specified in the recordNot stated
Red HatRed Hat Enterprise Linux 7Not specified in the recordNot stated
Red HatRed Hat Enterprise Linux 8Not specified in the recordNot stated
Red HatRed Hat Enterprise Linux 9Not specified in the recordNot stated
SiemensSIMATIC CN 4100before V5.0V5.0
OracleGraalvm21.3.16Not stated
OracleGraalvm For JDK17.0.17; 21.0.9Not stated
OracleJDK1.8.0; 11.0.29; 17.0.17; 21.0.9; 25.0.1Not stated
OracleJRE1.8.0; 11.0.29; 17.0.17; 21.0.9; 25.0.1Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N. Scored by CNA (oracle.com).

Scoring systemScoreSeverityScored by
CVSS 3.17.4HighCNA (oracle.com)
CVSS 3.17.4HighCNA

Official description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: AWT, JavaFX). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and 21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.4 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N).

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Validation of Specified Type of Input

The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

More Improper Validation of Specified Type of Input vulnerabilities (CWE-1287)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Oracle Java SE

All Oracle Java SE vulnerabilities

Recent Improper Validation of Specified Type of Input vulnerabilities

Spotted an error? Tell us.