CVE-2010-0840

CVE-2010-0840 is a critical-severity vulnerability in Oracle Jre with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-25).

Key facts

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."

Frequently asked questions

What is 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 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."
How severe is CVE-2010-0840?
CVE-2010-0840 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2010-0840 being actively exploited?
Yes. CVE-2010-0840 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2010-0840?
CVE-2010-0840 primarily affects Oracle Jre. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-0840?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2010-0840 have an EU (EUVD) identifier?
Yes. CVE-2010-0840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2010-0865. It is also flagged as exploited in the EUVD (since 2022-05-25).
When was CVE-2010-0840 published?
CVE-2010-0840 was published on 2010-04-01 and last updated on 2026-06-16.

References

Affected products (10)

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