Security readout for executives and security teams
A flaw in the bytecode verifier inside very old Java Virtual Machines (Java 2 and JDK 1.1.x, disclosed in 1999) could let a malicious web page run code on a visitor's computer. It affects legacy Java runtimes from the late 1990s and has long been patched by Sun Microsystems. Modern Java installations are not impacted, so business risk today is limited to unmaintained legacy systems. Exposure is limited to endpoints or servers still running unpatched Java 2 or JDK 1.1.x runtimes from the 1999 era. Modern JVMs are not affected. Realistic exposure today would be legacy industrial, kiosk, or embedded systems that were never updated, plus any browser environment still permitting old Java applets. Low priority for modern environments. Any legacy system still running late-1990s JDK 1.1.x or Java 2 releases should be identified and retired or isolated, since those runtimes are unsupported and carry many known risks beyond this one. Mitigation focus: Upgrade any legacy Java Runtime Environments to a currently supported vendor release.; Consult the referenced Sun advisory (pr990329-01) for the original vendor-recommended patch level.; Remove or disable the Java browser plug-in on systems that do not require applet execution..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-1999-0440 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.