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CVE-2021-34798

Affected software11 products, listed below
Severity7.5 High CVSS 3.1 2 scores
WeaknessCWE-476
Published16 Sep 2021
Updated17 Jun 2026

Description

Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.

Exploitation status

Forecast only (65% 30-day chance)

No exploit has been reported in the sources we check. EPSS puts this CVE in the top 0.75% of all scored CVEs. That is a model's forecast, not a report of exploitation.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 65% 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

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2023 ↗ CPU 2023-Q2 Oracle Fusion Middleware / SSL Module (Apache HTTP Server) (12.2.1.4.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Fusion Middleware SSL Module (Apache HTTP Server) 12.2.1.4.0 12.2.1.4.0

Products and versions

18 products, 25 version entries
SourceVendorProductSchemeAffected versions
nvd apache http server generic ≤ 2.4.48
nvd broadcom brocade fabric operating system firmware generic any version
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 communications cloud native core network function cloud native environment generic 1.10.0
nvd oracle enterprise manager base platform generic 13.4.0.0 · 13.5.0.0
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 peoplesoft enterprise peopletools generic 8.58
nvd oracle zfs storage appliance kit generic 8.8
nvd siemens ruggedcom nms generic any version
nvd siemens sinec nms generic any version
nvd siemens sinema remote connect server generic < 3.1
nvd siemens sinema server generic 14.0
nvd tenable tenable.sc generic ≤ 5.19.1

References

URLTags
http://httpd.apache.org/security/vulnerabilities_24.html Release Notes, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf Patch, Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10379 Third Party Advisory
https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E
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/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/

Timeline

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