CVE-2021-39275: Apache Software Foundation Apache HTTP Server

Affected products, as the CNA wrote them
Vendor	Product	Versions
Apache Software Foundation	Apache HTTP Server	affected Apache HTTP Server 2.4 to 2.4.48, inclusive custom

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.39, the 98th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 16 Sept 2021. New records show when each source confirmed them.

Sources

References from the CNA

httpd.apache.org/security/vulnerabilities_24.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ vendor-advisoryfedora
lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E mailing-listmlist
lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E mailing-listmlist
lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E mailing-listmlist
lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E mailing-listmlist
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ vendor-advisoryfedora
lists.debian.org/debian-lts-announce/2021/10/msg00001.html mailing-listmlist
www.debian.org/security/2021/dsa-4982 vendor-advisorydebian
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ vendor-advisorycisco
www.oracle.com/security-alerts/cpujan2022.html
security.netapp.com/advisory/ntap-20211008-0004/ confirm
www.oracle.com/security-alerts/cpuapr2022.html
cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf confirm
security.gentoo.org/glsa/202208-20 vendor-advisorygentoo

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.