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CVE Record

CVE-2021-35561: Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Utili...

Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Utility). 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 can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. 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).

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a medium-severity Oracle Java issue that can let an unauthenticated network attacker cause partial denial of service. The business risk is service disruption where affected Java or GraalVM runtimes process untrusted code or untrusted data through relevant APIs.

Executive priority

Treat this as a routine but necessary Java security update. It is not documented as actively exploited in the supplied sources, but affected internet-facing or untrusted-input Java workloads should be patched promptly to reduce disruption risk.

Technical view

CVE-2021-35561 affects Java SE 7u311, 8u301, 11.0.12, 17 and Oracle GraalVM Enterprise Edition 20.3.3 and 21.2.0. Oracle describes it as easily exploitable over multiple protocols without authentication, with availability-only impact: partial denial of service. CVSS is 5.3, AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Likely exposure

Exposure is most likely in affected Java or GraalVM deployments that load untrusted sandboxed code, such as Java Web Start or applets, or services that pass externally supplied data into the affected Utility component APIs.

Exploitation context

The supplied sources do not show CISA KEV listing or active exploitation. Oracle says exploitation is unauthenticated over the network and can occur through multiple protocols, but the documented impact is limited to partial availability loss.

Researcher notes

No CWE or root-cause detail is provided in the source bundle. Oracle identifies the component only as Utility and does not name specific APIs. Assessment should focus on affected runtime versions, sandboxed untrusted-code use, and services feeding untrusted data into Java APIs.

Mitigation direction

  • Inventory Java SE, JDK/JRE, OpenJDK, and GraalVM Enterprise versions.
  • Upgrade affected runtimes using Oracle or operating-system vendor security updates.
  • Check NetApp guidance if Java is embedded in NetApp-supported products.
  • Prioritize internet-facing services that process untrusted data through Java APIs.
  • Retire or isolate legacy Java Web Start and applet sandbox use.
  • Follow vendor guidance where exact replacement versions differ by distribution.

Validation and detection

  • Compare deployed runtime versions against Oracle's affected version list.
  • Confirm package updates from Oracle, Debian, Fedora, Gentoo, or your vendor.
  • Review application paths that process untrusted external data in Java services.
  • Identify any remaining Java Web Start or applet dependencies.
  • Verify vendor advisories apply to embedded or appliance-managed Java runtimes.
Prepared
Confidence
high
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-35561 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
13Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2021-35561Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationJava SE JDK and JREJava SE:7u311, Java SE:8u301, Java SE:11.0.12, Java SE:17, Oracle GraalVM Enterprise Edition:20.3.3, Oracle GraalVM Enterprise Edition:21.2.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.