CVE-2008-5353: The Java Runtime Environment (JRE) for Sun JDK and JRE 6 Update 10 and earlier; JDK and JRE 5.0 Update 16 and earlier…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 5 Jan 2010. It cites 2 public reports, the first from 5 Jan 2010.

• isc.sans.edu
• virusbulletin.com

How likely is exploitation in the next 30 days?

85.8%

EPSS score, percentile 99.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (12)

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 30 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

The Java Runtime Environment (JRE) for Sun JDK and JRE 6 Update 10 and earlier; JDK and JRE 5.0 Update 16 and earlier; and SDK and JRE 1.4.2_18 and earlier does not properly enforce context of ZoneInfo objects during deserialization, which allows remote attackers to run untrusted applets and applications in a privileged context, as demonstrated by "deserializing Calendar objects".

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

• SSRT090049 (Vendor advisory)
• SUSE-SA:2009:018 (Vendor advisory)
• RHSA-2008:1018 (Vendor advisory)
• GLSA-200911-02 (Vendor advisory)
• SUSE-SA:2009:007 (Vendor advisory)
• SSRT080111 (Vendor advisory)
• RHSA-2009:0466 (Vendor advisory)
• SUSE-SR:2009:006 (Vendor advisory)
• RHSA-2008:1025 (Vendor advisory)
• RHSA-2009:0445 (Vendor advisory)
• 244991 (Vendor advisory)
• RHSA-2009:0016 (Vendor advisory)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline