How severe is CVE-2021-3059?

CVE-2021-3059 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3059 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3059?

CVE-2021-3059 affects Paloaltonetworks Pan-os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3059?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-3059 published?

CVE-2021-3059 was published on 2021-11-10 and last updated on 2026-06-17.

CVE-2021-3059

CVE-2021-3059 is a high-severity vulnerability in Paloaltonetworks Pan-os with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 7.6
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Paloaltonetworks Pan-os
Published: 2021-11-10
Last modified: 2026-06-17

Description

An OS command injection vulnerability in the Palo Alto Networks PAN-OS management interface exists when performing dynamic updates. This vulnerability enables a man-in-the-middle attacker to execute arbitrary OS commands to escalate privileges. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20-h1; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h3; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h2; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers that have Prisma Access 2.1 Preferred or Prisma Access 2.1 Innovation firewalls are impacted by this issue.

Frequently asked questions

What is CVE-2021-3059?: An OS command injection vulnerability in the Palo Alto Networks PAN-OS management interface exists when performing dynamic updates. This vulnerability enables a man-in-the-middle attacker to execute arbitrary OS commands to escalate privileges. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20-h1; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h3; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h2; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers that have Prisma Access 2.1 Preferred or Prisma Access 2.1 Innovation firewalls are impacted by this issue.
How severe is CVE-2021-3059?: CVE-2021-3059 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3059 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3059?: CVE-2021-3059 affects Paloaltonetworks Pan-os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3059?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-3059 published?: CVE-2021-3059 was published on 2021-11-10 and last updated on 2026-06-17.

References

https://security.paloaltonetworks.com/CVE-2021-3059

Affected products (1)

cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*

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