CVE-2020-4019

Local code execution via cmd.exe search path

Published Jun 1, 2020 · Updated Sep 16, 2024

Untrusted Search Path in Atlassian Companion before 1.0.0 allows local attackers to execute a different executable through file editing. The file-editing code invokes cmd.exe using an untrusted search path, allowing a planted executable to be selected instead of the intended command interpreter. Exploitation requires local access and user interaction with file editing; successful substitution can provide code execution with the app user's privileges.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Untrusted Search Path in Atlassian Companion before 1.0.0 allows local attackers to execute a different executable through file editing. The file-editing code invokes cmd.exe using an untrusted search path, allowing a planted executable to be selected instead of the intended command interpreter. Exploitation requires local access and user interaction with file editing; successful substitution can provide code execution with the app user's privileges.

The record

CVE
CVE-2020-4019
Published
Jun 1, 2020
Updated
Sep 16, 2024
Vendor
Atlassian
Product
Atlassian Companion
Classifications
CWE-426, T1574.007
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Atlassian · Atlassian Companionversion=unspecified <1.0.0

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.4NVDAV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-426Untrusted Search Path
T1574.007Path Interception by PATH Environment Variable

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo