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CVE-2021-39275

Affected software9 products, listed below
Severity9.8 Critical CVSS 3.1 2 scores
WeaknessOut-of-bounds write (CWE-787)
Published16 Sep 2021
Updated17 Jun 2026

Description

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 39% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99% of all scored CVEs.

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2022 ↗ CPU 2022-Q2 Oracle Fusion Middleware / Web Listener (Apache HTTP Server) (12.2.1.3.0, 12.2.1.4.0)
Oracle Systems / Operating System Image (8.8)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Fusion Middleware Web Listener (Apache HTTP Server) 12.2.1.3.0, 12.2.1.4.0 12.2.1.3.0 · 12.2.1.4.0
Oracle Systems Operating System Image 8.8 8.8

Products and versions

11 products, 17 version entries
SourceVendorProductSchemeAffected versions
nvd apache http server generic < 2.4.49
nvd debian debian linux generic 9.0 · 10.0 · 11.0
nvd fedoraproject fedora generic 34 · 35
nvd netapp cloud backup generic any version
nvd netapp clustered data ontap generic any version
nvd netapp storagegrid generic any version
nvd oracle http server generic 12.2.1.3.0 · 12.2.1.4.0
nvd oracle instantis enterprisetrack generic 17.1 · 17.2 · 17.3
nvd oracle zfs storage appliance kit generic 8.8
nvd siemens sinec nms generic any version
nvd siemens sinema server generic 14.0

References

URLTags
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf Third Party Advisory
https://httpd.apache.org/security/vulnerabilities_24.html Release Notes, Vendor Advisory
https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E Patch
https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E Patch
https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E Patch
https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E Patch
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ Third Party Advisory
https://security.gentoo.org/glsa/202208-20 Third Party Advisory

Timeline

Published2021-09-16By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.