CVE-2021-27077: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-rrjm-v6pf-g5w6
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CVSS 7.8
CWE-269
Published
Advisory Summary

CVE-2021-27077 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-269: Improper Privilege Management) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-27077 at a Glance

CVE Identifier CVE-2021-27077
GHSA Identifier GHSA-rrjm-v6pf-g5w6
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-269: Improper Privilege Management
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-27077

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-27077, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Windows Win32k Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-26863, CVE-2021-26875, CVE-2021-26900.

References

NVD — CVE-2021-27077 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27077
msrc.microsoft.com/update-guide/vulner... WEB
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27077
Software Security Information SECURITY
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27077
www.zerodayinitiative.com/advisories/zdi-21-2... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-287
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-403
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-482
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-494
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-495
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-496
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-497
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-498
www.zerodayinitiative.com/advisories/zdi-21-4... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-499
www.zerodayinitiative.com/advisories/zdi-21-5... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-500
www.zerodayinitiative.com/advisories/zdi-21-5... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-501

Frequently Asked Questions

What is CVE-2021-27077?
CVE-2021-27077 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-269: Improper Privilege Management.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-27077?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-27077?
CVE-2021-27077 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-27077?
CVE-2021-27077 is classified under CWE-269: Improper Privilege Management (The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.).
How can I check Maven dependencies for CVE-2021-27077?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-rrjm-v6pf-g5w6",
  "modified" : "2026-08-19T18:31:35Z",
  "published" : "2022-05-24T17:44:25Z",
  "aliases" : [ "CVE-2021-27077" ],
  "details" : "Windows Win32k Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-26863, CVE-2021-26875, CVE-2021-26900.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
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  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-287"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-482"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-494"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-495"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-496"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-497"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-498"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-499"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-500"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-501"
  } ],
  "database_specific" : {
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    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2021-03-11T16:15:00Z"
  }
}