CVE-2010-0840
CVE-2010-0840 is a security flaw in Oracle Java Runtime Environment (JRE), which runs apps on computers and servers. Attackers can run their own code on Oracle Java Runtime Environment (JRE). The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 25 May 2022.[1]
Oracle Java Runtime Environment (JRE) is in things households have, such as phones, computers, browsers and everyday apps, so the fix matters at home as much as at work.
Description
CISA calls it a JRE unspecified in Oracle Java Runtime Environment (JRE). In its words: “Unspecified vulnerability in the Java Runtime Environment (JRE) in Java SE component allows remote attackers to affect confidentiality, integrity, and availability via Unknown vectors.”[1]
The CVE record adds: “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."”[2]
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it. CISA names the product as Oracle Java Runtime Environment (JRE).
Every device with Oracle Java Runtime Environment (JRE) needs the update.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 25 May 2022, 4,437 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 15 Jun 2022 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 96%. That’s in the top 1% of the flaws it scores.[3]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
CISA’s required action: “Apply updates per vendor instructions.”[1]
- Update Oracle Java Runtime Environment (JRE) now.Install the latest update from Oracle on every device that has it, and restart when asked. Then turn on automatic updates, so the next fix arrives on its own.
- If there’s no update, stop using it.CISA’s advice when a flaw being used in attacks has no fix is to stop using the product until it does.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 96%.[3] |
See also
Other Oracle Java Runtime Environment (JRE) flaws
- CVE-2013-2423: JRE unspecified ·
- CVE-2013-0431: JRE sandbox bypass ·
- CVE-2013-0422: JRE remote code execution ·
Other Oracle flaws
- CVE-2026-21962, Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in: improper access control ·
- CVE-2026-46817, Oracle E-Business Suite: improper privilege management ·
- CVE-2026-35273, Oracle PeopleSoft Enterprise PeopleTools: missing authentication for critical function ·
- CVE-2024-21182, Oracle WebLogic Server: unspecified ·
- CVE-2025-61757, Oracle Fusion Middleware: missing authentication for critical function ·
Similar flaws
- CVE-2026-111357, Ivanti Connect Secure: missing authentication for critical function ·
- CVE-2026-97229, GitLab Community Edition and Enterprise Edition: integer overflow or wraparound ·
- CVE-2026-76418, Cisco Secure Firewall ASA Software and Cisco Secure FTD Software: unchecked return value to NULL pointer dereference ·
- CVE-2026-48356, Adobe Commerce and Magento: unrestricted upload of file with dangerous type ·
- CVE-2026-111497, Google Brotli: unchecked return value ·
Added the same day
- CVE-2019-3010, Oracle Solaris: privilege escalation ·
- CVE-2016-7256, Microsoft Windows: open type font remote code execution ·
- CVE-2016-3393, Microsoft Windows: graphics device interface (GDI) remote code execution ·
- CVE-2016-1010, Adobe Flash Player and AIR: integer overflow ·
- CVE-2016-0984, Adobe Flash Player and AIR: use-after-free ·
Every Oracle flaw on CISA’s list · Everything added in May 2022
References
- ^ Cybersecurity and Infrastructure Security Agency. “Oracle JRE Unspecified Vulnerability”. Known Exploited Vulnerabilities Catalog, added 25 May 2022.
- ^ National Institute of Standards and Technology. “CVE-2010-0840 Detail”. National Vulnerability Database, published 1 Apr 2010.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.963, percentile 99.9, 31 Oct 2026.
- CVE Program. “CVE-2010-0840”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.