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CVE-2021-3055

6.5 MEDIUM

An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an au...

Published: 2021-09-08 · Last updated: 2026-06-17

Severity and scoring

CVSS
6.5 MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-611

Affected products

VendorProduct
paloaltonetworkspan-os

Description

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 restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-0257 — Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker ... (9.1 CRITICAL)
  • CVE-2025-0130 — A missing exception check in Palo Alto Networks PAN-OS® software with the web proxy feature enabled allows an unauthenticated attacker to... (7.5 HIGH)
  • CVE-2021-3057 — A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a man-in-the-middle attacker ... (8.1 HIGH)
  • CVE-2021-3054 — A time-of-check to time-of-use (TOCTOU) race condition vulnerability in the Palo Alto Networks PAN-OS web interface enables an authentica... (7.2 HIGH)
  • CVE-2021-3053 — An improper handling of exceptional conditions vulnerability exists in the Palo Alto Networks PAN-OS dataplane that enables an unauthenti... (7.5 HIGH)

Same CWE

  • CVE-2026-49875 — Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the necessary JAXP hardening c... (9.8 CRITICAL)
  • CVE-2026-40998 — Jaxp13XPathTemplate evaluated XPath expressions for StreamSource and SAXSource inputs using a code path that parsed attacker-controlled X... (8.2 HIGH)
  • CVE-2026-40991 — When using spring-restdocs-webtestclient or spring-restdocs-restassured to document a remote API accessed over HTTP, an attacker who comp... (5.9 MEDIUM)
  • CVE-2026-47960 — ColdFusion versions 2023.19, 2025.8 and earlier are affected by an Improper Restriction of XML External Entity Reference ('XXE') vulnerab... (7.4 HIGH)
  • CVE-2026-8045 — CWE-611 Improper Restriction of XML External Entity Reference vulnerability exists that could cause information disclosure of server-side...