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CVE-2026-21925VulnerabilityPublished Updated

Red Hat Security Advisory: OpenJDK 25.0.2 Security Update for Windows Builds

Affects Red Hat OpenJDK 25.0.2Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-21925· Medium 4.8

Not known to be exploited · CVSS 4.8 Medium.

Data as of 30 Oct 2026, 06:15 UTC

CVSS 3.1 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Oracle CorporationOracle Java SEAffected
  • 8u471 – 25.0.1
7 affected builds
Fixed in–
Oracle CorporationOracle GraalVM for JDKAffected
  • =17.0.17
  • =21.0.9
Fixed in–
Oracle CorporationOracle GraalVM Enterprise EditionAffected
  • =21.3.16
Fixed in–
Mavencom.oracle/java-sepkg:maven/com.oracle/java-seOther threatsAffected
  • 11.0.29 – 25.0.1
4 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the OpenJDK 25.0.2 update for Windows as provided by Red Hat, which replaces version 25.0.1. Ensure all previously released relevant errata are applied before updating. Follow the update instructions detailed in Red Hat's documentation at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory.

Description

Red Hat has released a security update for the Eclipse Temurin build of OpenJDK 25 (version 25.0.2) for Windows, replacing version 25.0.1. This update addresses multiple security issues including improvements to JMX connections, URI handling, HttpServer request processing, and certificate checking. The update is rated as having an important security impact. Users are advised to apply this update after ensuring all previous relevant errata are installed.

References

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