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CVE-2021-35556 Oracle Java SE

Affected softwareOracle Java SE
Affected versionsJava SE: 7u311, 8u301, 11.0.12, 17; Oracle GraalVM Enterprise Edition: 20.3.3, 21.2.0
Severity5.3 Medium CVSS 3.1 3 scores
Fixed inOracle Critical Patch Update October 2021
WeaknessCWE-693
Published20 Oct 2021
Updated17 Jun 2026

Description

Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Swing). Supported versions that are affected are Java SE: 7u311, 8u301, 11.0.12, 17; Oracle GraalVM Enterprise Edition: 20.3.3 and 21.2.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Oracle GraalVM Enterprise Edition. 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Exploitation status

Proof of concept only

A proof of concept exists, but no reviewed exploit catalogue lists this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: poc CISA recorded that an exploit has been demonstrated. Automatable: yes, technical impact: partial.
  • Indexed PoC none indexed
  • EPSS 8.4% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed
Finding The Oracle Critical Patch Update October 2021 advisory says this vulnerability is reached only through untrusted code running in the Java sandbox, such as an applet or a Web Start application: "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)." A server JVM that runs only its own trusted code is not exposed, so there is nothing for the agent to protect.

CVSS

5.3 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L secalert_us@oracle.com Secondary published
CVSS 3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L NVD Secondary
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2021 ↗ CPU 2021-Q4 Oracle Java SE / Swing (Java SE: 7u311, 8u301, 11.0.12, 17; Oracle GraalVM Enterprise Edition: 20.3.3, 21.2.0)
Oracle's 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).

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Java SE Swing Java SE: 7u311, 8u301, 11.0.12, 17; Oracle GraalVM Enterprise Edition: 20.3.3, 21.2.0 7.0.311.0 · 8.0.301.0 · 11.0.12.0 · 17.0.0.0 · 20.3.3.0 · 21.2.0.0

Products and versions

14 products, 22 version entries
SourceVendorProductSchemeAffected versions
nvd debian debian linux generic 9.0 · 10.0 · 11.0
nvd fedoraproject fedora generic 33 · 34 · 35
nvd netapp active iq unified manager generic any version
nvd netapp e-series santricity os controller generic ≥ 11.0.0 and ≤ 11.50.2
nvd netapp e-series santricity storage manager generic any version
nvd netapp e-series santricity web services generic any version
nvd netapp hci management node generic any version
nvd netapp oncommand insight generic any version
nvd netapp oncommand workflow automation generic any version
nvd netapp santricity unified manager generic any version
nvd netapp snapmanager generic any version
nvd netapp solidfire generic any version
nvd oracle graalvm javase 20.3.3 · 21.2.0
nvd oracle openjdk javase 7:update311 · 8:update301 · 11.0.12 · 17

References

URLTags
https://access.redhat.com/errata/RHSA-2021:3884 ADVISORY, RHSA-2021:3884
https://access.redhat.com/security/cve/CVE-2021-35556 REPORT, RHSA-2021:3884
https://access.redhat.com/errata/RHSA-2021:3885 ADVISORY, RHSA-2021:3885
https://access.redhat.com/errata/RHSA-2021:3886 ADVISORY, RHSA-2021:3886
https://access.redhat.com/errata/RHSA-2021:3887 ADVISORY, RHSA-2021:3887
https://access.redhat.com/errata/RHSA-2021:3889 ADVISORY, RHSA-2021:3889
https://access.redhat.com/errata/RHSA-2021:3891 ADVISORY, RHSA-2021:3891
https://access.redhat.com/errata/RHSA-2021:3892 ADVISORY, RHSA-2021:3892
https://access.redhat.com/errata/RHSA-2021:3893 ADVISORY, RHSA-2021:3893
https://access.redhat.com/errata/RHSA-2021:4135 ADVISORY, RHSA-2021:4135

Timeline

Published2021-10-20By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.