Security readout for executives and security teams
CVE-2021-45046 is a critical Apache Log4j2 issue caused by an incomplete fix for Log4Shell in version 2.15.0. In specific non-default logging configurations, attacker-controlled context data could trigger JNDI lookup behavior, causing severe impact in some environments and denial-of-service risk. Exposure is most likely in Java applications or embedded products using Apache Log4j2 2.15.0 with non-default Pattern Layout configurations involving context lookups or MDC patterns. Vendor advisories show broad downstream product impact, so inventory must include packaged and transitive dependencies. Treat this as high-priority remediation where Log4j2 exists, especially on externally reachable systems. The KEV signal means delayed remediation carries real operational risk, even though exploitability depends on configuration and environment. Mitigation focus: Upgrade Log4j per Apache guidance; sources name 2.16.0 for Java 8 and 2.12.2 for Java 7.; Check current vendor advisories for embedded Log4j in commercial products.; Prioritize internet-facing Java services and security appliances using Log4j2..
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
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ATT&CK lookup starting points
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CWE-917: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
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Open ATT&CK lookupCVE-2021-45046 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H2.26Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9CriticalVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032CVE reference · x_refsource_CONFIRM
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.htmlCVE reference · x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2021-44228CVE reference · x_refsource_MISC
- https://logging.apache.org/log4j/2.x/security.htmlCVE reference · x_refsource_CONFIRM
- VU#930724CVE reference · third-party-advisory, x_refsource_CERT-VN
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdfCVE reference · x_refsource_CONFIRM
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.htmlCVE reference · x_refsource_CONFIRM
- 20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021CVE reference · vendor-advisory, x_refsource_CISCO
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdfCVE reference · x_refsource_CONFIRM
- DSA-5022CVE reference · vendor-advisory, x_refsource_DEBIAN
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdfCVE reference · x_refsource_CONFIRM
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdfCVE reference · x_refsource_CONFIRM
- FEDORA-2021-5c9d12a93eCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-abbe24e41cCVE reference · vendor-advisory, x_refsource_FEDORA
- https://www.oracle.com/security-alerts/cpujan2022.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2022.htmlCVE reference · x_refsource_MISC
- https://security.gentoo.org/glsa/202310-16CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45046CVE reference · government-resource
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.
Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.