CVE-2026-0288PAN-OS: Buffer Overflow Vulnerabilities in User-ID Terminal Server Agent

Description

Multiple buffer overflow vulnerabilities in the User-ID Terminal Server Agent (TSA) component of Palo Alto Networks PAN-OS software allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic. The security risk posed by this issue is minimized when the User-ID Terminal Server Agent connectivity is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://docs.paloaltonetworks.com/ngfw/help/10-2/user-identification/device-user-identification-terminal-services-agents#:~:text=To%20minimize%20security%20risk%2C%20restrict%20TS%20Agent%20connectivity%20to%20trusted%20internal%20IP%20addresses%20only. . Panorama is not impacted by this vulnerability.

Timeline

Scores

EPSS (exploitation in 30 days)

0.83% · top 42% of all CVEs (12 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Affected products

• Palo Alto Networks · Cloud NGFW

  • unaffected All

• Palo Alto Networks · PAN-OS

  • affected 12.1.0 – < 12.1.8
  • affected 11.2.0 – < 11.2.13
  • affected 11.1.0 – < 11.1.16
  • affected 10.2.0 – < 10.2.7-h36

• Palo Alto Networks · Prisma Access

  • affected 11.2.0 – < 11.2.7-h18
  • affected 10.2.0 – < 10.2.10-h39

What to do

Solution: Version Minor Version Suggested Solution Cloud NGFWNo action needed. PAN-OS 12.1 12.1.5 through 12.1.7-h* Upgrade to 12.1.7-h2 or 12.1.8 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h8 or 12.1.8 or later. PAN-OS 11.2 11.2.0 through 11.2.12 Upgrade to 11.2.13 or later. 11.2.0 through 11.2.10-h* Upgrade to 11.2.10-h12 or 11.2.13 or later. 11.2.0 through 11.2.7-h* Upgrade to 11.2.7-h18 or 11.2.13 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h20 or 11.2.13 or later. PAN-OS 11.1 11.1.0 through 11.1.15 Upgrade to 11.1.16 or later. 11.1.0 through 11.1.13-h* Upgrade to 11.1.13-h9 or 11.1.16 or later. 11.1.0 through 11.1.10-h* Upgrade to 11.1.10-h30 or 11.1.16 or later. 11.1.0 through 11.1.7-h* Upgrade to 11.1.7-h8 or 11.1.16 or later. 11.1.0 through 11.1.6-h* Upgrade to 11.1.6-h35 or 11.1.16 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h35 or 11.1.16 or later. PAN-OS 10.2 10.2.0 through 10.2.18-h* Upgrade to 10.2.18-h8 or later.  10.2.0 through 10.2.16-h*Upgrade to 10.2.16-h9 or later. 10.2.0 through 10.2.13-h* Upgrade to 10.2.13-h23 or later. 10.2.0 through 10.2.10-h* Upgrade to 10.2.10-h39 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h36 or later. All older unsupported PAN-OS versions Upgrade to a supported fixed version. Prisma Access 11.2 11.2.0 through 11.2.7 Upgrade to 11.2.7-h18 or later.* Prisma Access 10.2 10.2.0 through 10.2.10 Upgrade to 10.2.10-h39 or later.* * See the note under Product Status for information regarding Prisma Access upgrades.

Workaround: The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you have not already, we strongly recommend that you restrict your User-ID Terminal Server Agent connectivity to only trusted internal IP addresses according to our  best practice deployment guidelines https://docs.paloaltonetworks.com/ngfw/help/10-2/user-identification/device-user-identification-terminal-services-agents#:~:text=To%20minimize%20security%20risk%2C%20restrict%20TS%20Agent%20connectivity%20to%20trusted%20internal%20IP%20addresses%20only.

Exploitation: Palo Alto Networks is not aware of any malicious exploitation of these issues.

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)
• EUVD EUVD-2026-42388 (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

[![CVE-2026-0288](https://cveledger.app/badge/CVE-2026-0288.svg)](https://cveledger.app/cve/CVE-2026-0288)

Record last updated 10 Nov 2026, 12:40 UTC.