UpHeron
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Servers and applications

CVE-2020-1999

A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker to communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets. This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions…

Severity
Medium 5.3
Published
12 Nov 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.1.17, 9.0.11, 9.1.5
Sources
NVD

Affected software

SoftwareAffected versions
Palo Alto Networks PAN-OSServers and applications · cpe:o:paloaltonetworks:pan-os
  • From 7.1.0 up to 7.1.26
  • From 8.0.0 up to 8.0.20
  • From 8.1.0 before 8.1.17
  • From 9.0.0 before 9.0.11
  • From 9.1.0 before 9.1.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-1999
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-1999