Live › vulnerability › CVE-2021-41773
Go to dashboardApache HTTP Server 2.4.49 allows path traversal through crafted URLs, letting remote attackers read files outside the web root. If CGI scripts are enabled, the flaw can lead to remote code execution on the server.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Apache HTTP Server | vendor | – | – |
2.4.49ScriptAlias\|mod_cgi on the Apache config directoryUpgrade Apache HTTP Server to a fixed release; this CVE's original patch was insufficient, so follow CVE-2021-42013 for the complete fix.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
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