CVE-2020-11498Network attack vector

Root code execution via relative executable paths

Published Apr 2, 2020 · Updated Aug 4, 2024

Path traversal in Slack Nebula through 1.1.0 allows remote authenticated users to execute code as root via crafted relative paths. The tun_darwin.go and tun_windows.go implementations invoke system binaries through attacker-influenced PATH resolution instead of fixed absolute paths, allowing a low-privileged user to substitute executables. Exploitation requires the high degree of access and other difficult preconditions identified by the vendor; code execution can occur with root privileges or in the initiating user's context.

CVSS severity8.8
High
EPSS probability3.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Slack Nebula through 1.1.0 allows remote authenticated users to execute code as root via crafted relative paths. The tun_darwin.go and tun_windows.go implementations invoke system binaries through attacker-influenced PATH resolution instead of fixed absolute paths, allowing a low-privileged user to substitute executables. Exploitation requires the high degree of access and other difficult preconditions identified by the vendor; code execution can occur with root privileges or in the initiating user's context.

The record

CVE
CVE-2020-11498
Published
Apr 2, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1574.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NVDAV:N/AC:M/Au:S/C:C/I:C/A:C
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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

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Your stack

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