CVE-2020-2011Network attack vector

Unauthenticated service interruption via malformed registration request

Published May 13, 2020 · Updated Sep 16, 2024

Improper input validation in Palo Alto Networks PAN-OS Panorama allows remote attackers to crash its configuration service. The configuration daemon fails to reject a specifically crafted registration request and terminates the configuration service while processing it. No authentication is required; repeated requests restart the device into maintenance mode and interrupt all Panorama services.

CVSS severity7.5
High
EPSS probability1.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Palo Alto Networks PAN-OS Panorama allows remote attackers to crash its configuration service. The configuration daemon fails to reject a specifically crafted registration request and terminates the configuration service while processing it. No authentication is required; repeated requests restart the device into maintenance mode and interrupt all Panorama services.

The record

CVE
CVE-2020-2011
Published
May 13, 2020
Updated
Sep 16, 2024
Vendor
Palo Alto Networks
Product
PAN-OS
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.1.*
  2. Affected versionversion=8.0.*
  3. Affected versionversion=8.1 <8.1.14 changes=[{"at":"8.1.14","status":"unaffected"}]
  4. Affected versionversion=9.0 <9.0.7 changes=[{"at":"9.0.7","status":"unaffected"}]
  5. Affected versionversion=9.1 <9.1.0 changes=[{"at":"9.1.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Palo Alto Networks · PAN-OSversion=7.1.*; version=8.0.*; version=8.1 <8.1.14 changes=[{"at":"8.1.14","status":"unaffected"}]; version=9.0 <9.0.7 changes=[{"at":"9.0.7","status":"unaffected"}]; version=9.1 <9.1.0 changes=[{"at":"9.1.0","status":"unaffected"}]

Published CVSS scores

7.5Palo Alto NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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