CVE-2021-3064
PAN-OS: Memory Corruption Vulnerability in GlobalProtect Portal and Gateway Interfaces
- Published
- Updated
- Reserved
- Assigned by
- palo_alto
Description
A memory corruption vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to disrupt system processes and potentially execute arbitrary code with root privileges. The attacker must have network access to the GlobalProtect interface to exploit this issue. This issue impacts PAN-OS 8.1 versions earlier than PAN-OS 8.1.17. Prisma Access customers are not impacted by this issue.
Timeline
ID reserved
By palo_alto
- 10 months later
· 10 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| palo_altoCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 20.1% · top 2.5% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
- unaffected 9.0.*
- unaffected 9.1.*
- unaffected 10.0.*
- unaffected 10.1.*
- affected 8.1 – < 8.1.17
Palo Alto Networks · Prisma Access
- unaffected 2.2 all
- unaffected 2.1 all
What to do
Solution: This issue is fixed in PAN-OS 8.1.17 and all later PAN-OS versions.
Workaround: Enable signatures for Unique Threat IDs 91820 and 91855 on traffic destined for GlobalProtect portal and gateway interfaces to block attacks against CVE-2021-3064. It is not necessary to enable SSL decryption to detect and block attacks against this issue.
Exploitation: Palo Alto Networks is not aware of any malicious exploitation of this issue.
References (1)
- https://security.paloaltonetworks.com/CVE-2021-3064 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3064)Record last updated .