# What is CVE-2021-44832?

> CVE-2021-44832 is a medium-severity flaw (CVSS 6.6) in Log4j from Apache, published on 28 December 2021. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 98%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-44832

## At a glance

- **Verdict:** Fix this soon. Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
- **Precursor Intelligence risk score:** 76 out of 100 (High); action: Patch now. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 6.6 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 98% (latest exploit-likelihood forecast)
- **Published:** 28 December 2021
- **Record last updated:** 7 November 2023
- **Main product:** Log4j from Apache
- **Affected products:** 22

## What is CVE-2021-44832? In plain terms

It can be attacked from anywhere on the internet with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### The official description

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

### What kind of flaw is it?

- CWE-20: Improper Input Validation
- CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Hard: conditions must line up
- Login needed first: An administrator account
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H`

## Is CVE-2021-44832 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 98%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 98%, 98%, 98%, 98%, 98%, 98%, 98%.

### Timeline

- 28 December 2021: Published
- 7 November 2023: Record last updated
- 2 July 2025: Exploit likelihood fell
- 5 July 2025: Exploit likelihood jumped

### How Precursor Intelligence ranks it

CVE-2021-44832 scores **76 out of 100 (High)**, with the action "Patch now".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2021-44832?

The published record lists 22 products. Versions are as published: "2.0.1 to before 2.3.2" means from 2.0.1 up to, but not including, 2.3.2.

- [Log4j](https://www.precursorintelligence.com/product/apache/log4j) by [Apache](https://www.precursorintelligence.com/vendors/apache) (Application): 2.0-beta7, 2.0-beta8, 2.0-beta9, 2.0-rc1, 2.0-rc2, 2.0, 2.0.1 to before 2.3.2, 2.4 to before 2.12.4, 2.13.0 to before 2.17.1
- [Primavera Gateway](https://www.precursorintelligence.com/product/oracle/primavera_gateway) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 17.12.0 to 17.12.11, 18.8.0 to 18.8.13, 19.12.0 to 19.12.12, 20.12.0 to 20.12.7, 21.12.0
- [Retail Xstore Point of Service](https://www.precursorintelligence.com/product/oracle/retail_xstore_point_of_service) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 17.0.4, 18.0.3, 19.0.2, 20.0.1, 21.0.1
- [Primavera Unifier](https://www.precursorintelligence.com/product/oracle/primavera_unifier) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 18.8, 19.12, 20.12, 21.12
- [Health Sciences Data Management Workbench](https://www.precursorintelligence.com/product/oracle/health_sciences_data_management_workbench) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.5.2.1, 3.0.0.0, 3.1.0.3
- [Primavera P6 Enterprise Project Portfolio Management](https://www.precursorintelligence.com/product/oracle/primavera_p6_enterprise_project_portfolio_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 19.12.0 to 19.12.18.0, 20.12.0.0 to 20.12.12.0, 21.12.0.0
- [Weblogic Server](https://www.precursorintelligence.com/product/oracle/weblogic_server) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0
- [Communications Brm - Elastic Charging Engine](https://www.precursorintelligence.com/product/oracle/communications_brm_-_elastic_charging_engine) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 12.0.0.4.6, 12.0.0.5.0
- [Communications Interactive Session Recorder](https://www.precursorintelligence.com/product/oracle/communications_interactive_session_recorder) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.3, 6.4
- [Communications Offline Mediation Controller](https://www.precursorintelligence.com/product/oracle/communications_offline_mediation_controller) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 12.0.0.4.4, 12.0.0.5.0
- [Fedora](https://www.precursorintelligence.com/product/fedoraproject/fedora) by [Fedoraproject](https://www.precursorintelligence.com/vendors/fedoraproject) (Operating system): 34, 35
- [Retail Order Broker](https://www.precursorintelligence.com/product/oracle/retail_order_broker) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 18.0, 19.1
- [Cloudcenter](https://www.precursorintelligence.com/product/cisco/cloudcenter) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 4.10.0.16
- [Communications Diameter Signaling Router](https://www.precursorintelligence.com/product/oracle/communications_diameter_signaling_router) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.0.0.0 to 8.5.1.0
- [Debian Linux](https://www.precursorintelligence.com/product/debian/debian_linux) by [Debian](https://www.precursorintelligence.com/vendors/debian) (Operating system): 9.0
- [Flexcube Private Banking](https://www.precursorintelligence.com/product/oracle/flexcube_private_banking) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.1.0
- [Policy Automation](https://www.precursorintelligence.com/product/oracle/policy_automation) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.0 to 12.2.24
- [Policy Automation for Mobile Devices](https://www.precursorintelligence.com/product/oracle/policy_automation_for_mobile_devices) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.0 to 12.2.24
- [Product Lifecycle Analytics](https://www.precursorintelligence.com/product/oracle/product_lifecycle_analytics) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 3.6.1
- [Retail Assortment Planning](https://www.precursorintelligence.com/product/oracle/retail_assortment_planning) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 16.0.3
- [Retail Fiscal Management](https://www.precursorintelligence.com/product/oracle/retail_fiscal_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.2
- [Siebel UI Framework](https://www.precursorintelligence.com/product/oracle/siebel_ui_framework) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): up to 21.12

## How do I fix CVE-2021-44832?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [issues.apache.org](https://issues.apache.org/jira/browse/LOG4J2-3293) (Issue tracking, Patch, Vendor advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpuapr2022.html) (Patch, Third-party advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpujan2022.html) (Patch, Third-party advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpujul2022.html) (Patch, Third-party advisory)
- [lists.apache.org](https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143) (Mailing list, Vendor advisory)
- [openwall.com](http://www.openwall.com/lists/oss-security/2021/12/28/1) (Mailing list, Third-party advisory)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf) (Third-party advisory)
- [lists.debian.org](https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html) (Mailing list, Third-party advisory)
- [lists.fedoraproject.org](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA/)
- [lists.fedoraproject.org](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC/)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20220104-0001/) (Third-party advisory)
- [tools.cisco.com](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd) (Third-party advisory)

## Questions

### What is CVE-2021-44832?

CVE-2021-44832 is a medium-severity flaw in Log4j from Apache, published on 28 December 2021. It can be attacked from anywhere on the internet with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2021-44832?

It scores 6.6 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2021-44832 is 76 out of 100, which is High. Its action is "Patch now". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.

### Is CVE-2021-44832 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 98%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2021-44832 affect?

For Log4j from Apache: 2.0-beta7, 2.0-beta8, 2.0-beta9, 2.0-rc1, 2.0-rc2, 2.0 and 3 more. The record lists 22 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2021-44832?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2021-44832 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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