CISA KEV Critical Access control

CVE-2013-0422 — Oracle JRE Remote Code Execution Vulnerability

Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using the public getMBeanInstantiator method in the JmxMBeanServer class to obtain a reference to a private MBeanInstantiator object, then retrieving arbitrary Class references using the findClass method, and (2) using the Reflection API with recursion in a way that bypasses a security check by the java.lang.invoke.MethodHandles.Lookup.checkSecurityManager method due to the inability of the sun.reflect.Reflection.getCallerClass method to skip frames related to the new reflection API, as exploited in the wild in January 2013, as demonstrated by Blackhole and Nuclear Pack, and a different vulnerability than CVE-2012-4681 and CVE-2012-3174. NOTE: some parties have mapped the recursive Reflection API issue to CVE-2012-3174, but CVE-2012-3174 is for a different vulnerability whose details are not public as of 20130114. CVE-2013-0422 covers both the JMX/MBean and Reflection API issues. NOTE: it was originally reported that Java 6 was also vulnerable, but the reporter has retracted this claim, stating that Java 6 is not exploitable because the relevant code is called in a way that does not bypass security checks. NOTE: as of 20130114, a reliable third party has claimed that the findClass/MBeanInstantiator vector was not fixed in Oracle Java 7 Update 11. If there is still a vulnerable condition, then a separate CVE identifier might be created for the unfixed issue.

Published Jan 10, 2013 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database, GitHub Security Advisories · CNA: oracle

Urgent

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · May 25, 2022 R used by ransomware (CISA) Metasploit modules · 1 Exploit-DB · 1

How the score was calculated

Confirmed exploitation (CISA KEV)+35
Used in ransomware campaigns (CISA)+10
Public exploit/PoC (metasploit, exploitdb)+20
EPSS 97% (30-day exploitation probability)+15
Technical severity (critical)+10
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Confirmed

CISA KEV, listed May 25, 2022

EPSS FIRST

97.02%

ahead of 100% of scored CVEs · Oct 14, 2026

Affects

Canonical

Ubuntu Linux and 3 more

CVSS base

9.8

Critical · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Active

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Jun 15, 2022 — passed 1584 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Canonical Ubuntu Linux, Opensuse Opensuse, Oracle Jdk…).
Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
Search available logs for exploit probes matching the vulnerability class (access control), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Canonical	Ubuntu Linux	version 12.10	Vulnerable	NIST National Vulnerability Database
Opensuse	Opensuse	version 12.2	Vulnerable	NIST National Vulnerability Database
Oracle	Jdk	version 1.7.0-update9version 1.7.0-update7version 1.7.0-update6version 1.7.0-update5version 1.7.0-update4version 1.7.0-update3version 1.7.0-update2version 1.7.0-update10 and 2 more version 1.7.0-update1version 1.7.0	Vulnerable	NIST National Vulnerability Database
Oracle	Jre	version 1.7.0version 1.7.0-update1version 1.7.0-update10version 1.7.0-update2version 1.7.0-update3version 1.7.0-update4version 1.7.0-update5version 1.7.0-update6 and 2 more version 1.7.0-update7version 1.7.0-update9	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
9.8	CVSS 3.1	Critical	3.9	5.9	134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
9.8	CVSS 3.1	Critical	—	—	GitHub, Inc. via GitHub Security Advisories
9.8	CVSS 3.1	Critical	—	—	CISA-ADP via CVE Program (cve.org) e CISA ADP
10.0	CVSS 2.0	High	10.0	10.0	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 134c704f-9b21-4f2e-91b3-4a467353bcc0)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-284 · Improper Access Control

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed

May 25, 2022

Federal deadline

Jun 15, 2022

passed 1584 day(s) ago

Ransomware use

Known

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Metasploit modules

Java Applet JMX Remote Code Execution excellent Jan 10, 2013

Exploit-DB

Java Applet JMX - Remote Code Execution (Metasploit) (1) verified Jan 11, 2013

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 97.02%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Audit administrative actions and access to resources outside each user’s normal pattern.
Hunt retroactively in logs from before May 25, 2022 (KEV listing): exploitation may have started earlier.

web/proxy/WAF logsnetwork IDS/IPSauthentication logsapplication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · oracle/jdk, oracle/jre, canonical/ubuntu linux, opensuse/opensuse
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · Published → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record published
Oct 13, 2026
CVSS changed · 9.8
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Published
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Added to CISA KEV (detected)
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
Record created in this database
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
2022
Added to CISA KEV catalog
May 24, 2022 · CISA
2013
CVE published
Jan 10, 2013 · oracle

Source activity

Repeated readings are counted rather than listed.

3× References added · Oct 13, 2026 – Oct 13, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

25 on the record

www.oracle.com/technetwork/topics/security/alert-cve-2013-0422-1896849.html
x_refsource_CONFIRM, Vendor Advisory, CVE Program (cve.org) e CISA ADP
www.cisa.gov/known-exploited-vulnerabilities-catalog
US Government Resource, NIST National Vulnerability Database
rhn.redhat.com/errata/RHSA-2013-0156.html
vendor-advisory, x_refsource_REDHAT, Third Party Advisory, CVE Program (cve.org) e CISA ADP
threatpost.com/en_us/blogs/nasty-new-java-zero-day-found-exploit-kits-already-have-i
x_refsource_MISC, Not Applicable, CVE Program (cve.org) e CISA ADP
rhn.redhat.com/errata/RHSA-2013-0165.html
vendor-advisory, x_refsource_REDHAT, Third Party Advisory, CVE Program (cve.org) e CISA ADP
partners.immunityinc.com/idocs/Java%20MBeanInstantiator.findClass%200day%20Analysis.pdf
x_refsource_MISC, Broken Link, CVE Program (cve.org) e CISA ADP
krebsonsecurity.com/2013/01/zero-day-java-exploit-debuts-in-crimeware/
x_refsource_MISC, Third Party Advisory, CVE Program (cve.org) e CISA ADP
www.kb.cert.org/vuls/id/625617
third-party-advisory, x_refsource_CERT-VN, Third Party Advisory, US Government Resource, CVE Program (cve.org) e CISA ADP
krebsonsecurity.com/2013/01/zero-day-java-exploit-debuts-in-crimeware
GitHub Security Advisories
labs.alienvault.com/labs/index.php/2013/new-year-new-java-zeroday/
x_refsource_MISC, Broken Link, Third Party Advisory, CVE Program (cve.org) e CISA ADP
malware.dontneedcoffee.com/2013/01/0-day-17u10-spotted-in-while-disable.html
x_refsource_MISC, Third Party Advisory, CVE Program (cve.org) e CISA ADP
blog.fuseyism.com/index.php/2013/01/15/security-icedtea-2-1-4-2-2-4-2-3-4-released
GitHub Security Advisories
wiki.mageia.org/en/Support/Advisories/MGASA-2013-0018
x_refsource_CONFIRM, Third Party Advisory, CVE Program (cve.org) e CISA ADP
seclists.org/bugtraq/2013/Jan/48
mailing-list, x_refsource_BUGTRAQ, Mailing List, Third Party Advisory, CVE Program (cve.org) e CISA ADP
blog.fuseyism.com/index.php/2013/01/15/security-icedtea-2-1-4-2-2-4-2-3-4-released/
x_refsource_MISC, Broken Link, CVE Program (cve.org) e CISA ADP
lists.opensuse.org/opensuse-security-announce/2013-01/msg00025.html
vendor-advisory, x_refsource_SUSE, Mailing List, Third Party Advisory, CVE Program (cve.org) e CISA ADP
github.com/advisories/GHSA-r293-6mhc-29xx
GitHub Security Advisories
immunityproducts.blogspot.ca/2013/01/confirmed-java-only-fixed-one-of-two.html
x_refsource_MISC, Third Party Advisory, CVE Program (cve.org) e CISA ADP
labs.alienvault.com/labs/index.php/2013/new-year-new-java-zeroday
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2013-0422
GitHub Security Advisories
blog.fireeye.com/research/2013/01/happy-new-year-from-new-java-zero-day.html
x_refsource_MISC, Not Applicable, CVE Program (cve.org) e CISA ADP
www.mandriva.com/security/advisories
vendor-advisory, x_refsource_MANDRIVA, Not Applicable, CVE Program (cve.org) e CISA ADP
www.ubuntu.com/usn/USN-1693-1
vendor-advisory, x_refsource_UBUNTU, Third Party Advisory, CVE Program (cve.org) e CISA ADP
www-304.ibm.com/connections/blogs/PSIRT/entry/oracle_java_7_security_manager_bypass_v
x_refsource_MISC, Not Applicable, CVE Program (cve.org) e CISA ADP
www.us-cert.gov/cas/techalerts/TA13-010A.html
third-party-advisory, x_refsource_CERT, Third Party Advisory, US Government Resource, CVE Program (cve.org) e CISA ADP

Elsewhere on this site

Canonical
every CVE for this vendor

2022-05
what else CISA listed that month

Access control
same class

CWE-284
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-62574 Improper Access Control in Oracle Jre Jul 21, 2026
Medium CVE-2026-60526 Improper Input Validation in Oracle Jdk Jul 21, 2026
Low CVE-2026-60166 Vulnerability in Oracle Java SE (component: JavaFX). The supported version that is… Jul 21, 2026
Low CVE-2026-60164 Vulnerability in Oracle Java SE (component: JavaFX). The supported version that is… Jul 21, 2026
Medium CVE-2026-60147 Improper Access Control in Oracle Jre Jul 21, 2026
High CVE-2026-47063 Improper Access Control in Oracle Jre Jul 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2013-0422 is "Oracle JRE Remote Code Execution Vulnerability", rated Critical. It affects Ubuntu Linux (Canonical); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 9.8 describes technical severity. EPSS 97.02% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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