UpHeron
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Servers and applications

CVE-2021-3055

An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by…

Severity
Medium 6.5
Published
8 Sept 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.1.20, 9.0.14, 9.1.10, 10.0.6
Sources
NVD

Affected software

SoftwareAffected versions
Palo Alto Networks PAN-OSServers and applications · cpe:o:paloaltonetworks:pan-os
  • From 8.1.0 before 8.1.20
  • From 9.0.0 before 9.0.14
  • From 9.1.0 before 9.1.10
  • From 10.0.0 before 10.0.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-3055
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-3055