CVE-2010-0840

CVE-2010-0840 is an unspecified vulnerability in the Java Runtime Environment (JRE) component of Oracle Java SE that allows remote attackers to affect confidentiality, integrity, and availability through vectors Oracle did not publicly detail. Because the advisory withheld technical specifics, the exact trigger is undocumented, but the flaw is remotely exploitable, and the era's threat reporting (2011 exploit-kit and Java malware headlines) is consistent with drive-by exploitation of Java clients. A successful attacker gains the ability to compromise the confidentiality, integrity, or availability of the affected system, and Java flaws of this period were commonly leveraged to install malware such as bots. Any organization or end user running the affected JRE releases — whether the browser Java plug-in on desktops or server-side Java — is exposed, making the affected population extremely broad. The flaw is listed in CISA's Known Exploited Vulnerabilities catalog (added 2022-05-25), EPSS assigns it a 96.3% probability of exploitation in the next 30 days, and no public proof-of-concept is known.

What to do: Apply the Oracle Java SE updates specified by the vendor as required by CISA's KEV listing, and remove or disable obsolete or unsupported JRE versions, especially the browser Java plug-in where it is no longer needed. Prioritize internet-exposed and end-user systems, check for lingering legacy Java applets in use, and note that remediation is mandatory for federal agencies under the KEV program.