CVE-2020-13938

Local service interruption

Published Jun 10, 2021 · Updated Aug 4, 2024

Missing authorization in Apache HTTP Server 2.4.0 through 2.4.46 allows local users to stop httpd on Windows. Apache has not published the vulnerable code path or the missing privilege check that accepts a shutdown request from an unprivileged account. Any unprivileged local account can interrupt the Windows-hosted web service, while confidentiality and integrity are unaffected.

CVSS severity5.5
Medium
EPSS probability11.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Apache HTTP Server 2.4.0 through 2.4.46 allows local users to stop httpd on Windows. Apache has not published the vulnerable code path or the missing privilege check that accepts a shutdown request from an unprivileged account. Any unprivileged local account can interrupt the Windows-hosted web service, while confidentiality and integrity are unaffected.

The record

CVE
CVE-2020-13938
Published
Jun 10, 2021
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-862, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2021CVE 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?

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

  1. Affected versionversion=2.4.0
  2. Affected versionversion=2.4.1
  3. Affected versionversion=2.4.10
  4. Affected versionversion=2.4.12
  5. Affected versionversion=2.4.16
  6. Affected versionversion=2.4.17
  7. Affected versionversion=2.4.18
  8. Affected versionversion=2.4.2
  9. Affected versionversion=2.4.20
  10. Affected versionversion=2.4.23
  11. Affected versionversion=2.4.25
  12. Affected versionversion=2.4.26
  13. Affected versionversion=2.4.27
  14. Affected versionversion=2.4.28
  15. Affected versionversion=2.4.29
  16. Affected versionversion=2.4.3
  17. Affected versionversion=2.4.33
  18. Affected versionversion=2.4.34
  19. Affected versionversion=2.4.35
  20. Affected versionversion=2.4.37
  21. Affected versionversion=2.4.38
  22. Affected versionversion=2.4.39
  23. Affected versionversion=2.4.4
  24. Affected versionversion=2.4.41
  25. Affected versionversion=2.4.43
  26. Affected versionversion=2.4.46
  27. Affected versionversion=2.4.6
  28. Affected versionversion=2.4.7
  29. Affected versionversion=2.4.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=2.4.0; version=2.4.1; version=2.4.10; version=2.4.12; version=2.4.16; version=2.4.17; version=2.4.18; version=2.4.2; version=2.4.20; version=2.4.23; version=2.4.25; version=2.4.26; version=2.4.27; version=2.4.28; version=2.4.29; version=2.4.3; version=2.4.33; version=2.4.34; version=2.4.35; version=2.4.37; version=2.4.38; version=2.4.39; version=2.4.4; version=2.4.41; version=2.4.43; version=2.4.46; version=2.4.6; version=2.4.7; version=2.4.9

Published CVSS scores

5.5National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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