How severe is CVE-2010-0840?

CVE-2010-0840 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2010-0840?

Affected package information for CVE-2010-0840 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2010-0840?

No fixed version has been published for CVE-2010-0840 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2010-0840 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2010-0840, including 1 documented proof-of-concept exploit on Exploit-DB and 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2010-0840?

CVE-2010-0840 has an EPSS (Exploit Prediction Scoring System) score of 92.1%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2010-0840 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2010-0840 (Oracle JRE Unspecified Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-05-25. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-06-15. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Which products and versions are affected by CVE-2010-0840?

CVE-2010-0840 affects canonical ubuntu linux (4 versions, e.g. 8.04, 8.10, 9.04…); opensuse opensuse (3 versions, e.g. 11.0, 11.1, 11.2); oracle jre (3 versions, e.g. 1.4.2_25, 1.5.0, 1.6.0). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2010-0840 published, and has it been updated?

CVE-2010-0840 was published on April 1, 2010 and was last updated on April 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2010-0840: Ubuntu Linux Remote Code Execution (Critical 9.8)

EPSS Exploitation Probability

via FIRST.org ↗

92.1%probability of exploitation in next 30 days

Very High Risk100th percentile+0.07%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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."

Affected Products

3 products · 10 configurations

OS

ubuntu linuxcanonical

4 versions

8.048.109.049.10

OS

opensuseopensuse

3 versions

11.011.111.2

Application

jreoracle

3 versions

1.4.2_251.5.01.6.0

Frequently Asked Questions

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 cla

O3 Security · Impact-Aware SCA

Is CVE-2010-0840 in your stack?

O3 detects CVE-2010-0840 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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