CVE-2020-1982: PAN-OS: TLS 1.0 usage for certain communications with Palo Alto Networks cloud delivered services

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-08 · updated 2026-06-17
Weakness: CWE-326

Description

Certain communication between PAN-OS and cloud-delivered services inadvertently use TLS 1.0, which is known to be a cryptographically weak protocol. These cloud services include Cortex Data Lake, the Customer Support Portal, and the Prisma Access infrastructure. Conditions required for exploitation of known TLS 1.0 weaknesses do not exist for the communication between PAN-OS and cloud-delivered services. We do not believe that any communication is impacted as a result of known attacks against TLS 1.0. This issue impacts: All versions of PAN-OS 8.0; PAN-OS 8.1 versions earlier than PAN-OS 8.1.14; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 9.1 versions earlier than PAN-OS 9.1.3. PAN-OS 7.1 is not impacted by this issue.

Affected products

Palo Alto Networks PAN-OS: from 8.0.0 through 8.0.20; from 8.1.0 before 8.1.14; from 9.0.0 before 9.0.9; from 9.1.0 before 9.1.3 — fixed in 8.1.14, 9.0.9, 9.1.3
Palo Alto Networks PAN-OS: from 9.1 before 9.1.3; from 9.0 before 9.0.9; from 8.1 before 8.1.15; 8.0.* — fixed in 9.1.3, 9.0.9, 8.1.15

How to fix

Upgrade to a fixed version: Palo Alto Networks PAN-OS 8.1.14, 9.0.9, 9.1.3; Palo Alto Networks PAN-OS 9.1.3, 9.0.9, 8.1.15. Check the vendor advisory for mitigations.

References

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