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

Published Jul 8, 2026
·
Updated

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.

Other sources

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.

— Palo Alto Networks

Affected Software

205 affected componentsFixes available
Palo Alto Networks PAN-OS<12.1.8, =12.1.0, <11.2.13, =11.2.0, <11.1.16, =11.1.0, <10.2.7-h36, =10.2.0
12.1.812.1.7-h212.1.4-h811.2.1311.2.10-h1211.2.7-h1811.2.4-h2011.1.1611.1.13-h911.1.10-h3011.1.7-h811.1.6-h3511.1.4-h3510.2.18-h810.2.16-h910.2.13-h2310.2.10-h3910.2.7-h36
Palo Alto Networks Prisma Access<11.2.7-h18, =11.2.0, <10.2.10-h39, =10.2.0
11.2.7-h1810.2.10-h39
Palo Alto Networks PAN-OS>=10.2.0<10.2.7
Palo Alto Networks PAN-OS>=10.2.8<10.2.10
Palo Alto Networks PAN-OS>=10.2.11<10.2.13
Palo Alto Networks PAN-OS>=10.2.14<10.2.16
Palo Alto Networks PAN-OS=10.2.7
Palo Alto Networks PAN-OS=10.2.7-h1
Palo Alto Networks PAN-OS=10.2.7-h10
Palo Alto Networks PAN-OS=10.2.7-h11
Palo Alto Networks PAN-OS=10.2.7-h12
Palo Alto Networks PAN-OS=10.2.7-h13
Palo Alto Networks PAN-OS=10.2.7-h14
Palo Alto Networks PAN-OS=10.2.7-h15
Palo Alto Networks PAN-OS=10.2.7-h16
Palo Alto Networks PAN-OS=10.2.7-h17
Palo Alto Networks PAN-OS=10.2.7-h18
Palo Alto Networks PAN-OS=10.2.7-h19
Palo Alto Networks PAN-OS=10.2.7-h2
Palo Alto Networks PAN-OS=10.2.7-h20
Palo Alto Networks PAN-OS=10.2.7-h21
Palo Alto Networks PAN-OS=10.2.7-h22
Palo Alto Networks PAN-OS=10.2.7-h23
Palo Alto Networks PAN-OS=10.2.7-h24
Palo Alto Networks PAN-OS=10.2.7-h3
Palo Alto Networks PAN-OS=10.2.7-h32
Palo Alto Networks PAN-OS=10.2.7-h34
Palo Alto Networks PAN-OS=10.2.7-h35
Palo Alto Networks PAN-OS=10.2.7-h4
Palo Alto Networks PAN-OS=10.2.7-h5
Palo Alto Networks PAN-OS=10.2.7-h6
Palo Alto Networks PAN-OS=10.2.7-h7
Palo Alto Networks PAN-OS=10.2.7-h8
Palo Alto Networks PAN-OS=10.2.7-h9
Palo Alto Networks PAN-OS=10.2.10
Palo Alto Networks PAN-OS=10.2.10-h1
Palo Alto Networks PAN-OS=10.2.10-h10
Palo Alto Networks PAN-OS=10.2.10-h11
Palo Alto Networks PAN-OS=10.2.10-h12
Palo Alto Networks PAN-OS=10.2.10-h13
Palo Alto Networks PAN-OS=10.2.10-h14
Palo Alto Networks PAN-OS=10.2.10-h17
Palo Alto Networks PAN-OS=10.2.10-h18
Palo Alto Networks PAN-OS=10.2.10-h2
Palo Alto Networks PAN-OS=10.2.10-h21
Palo Alto Networks PAN-OS=10.2.10-h27
Palo Alto Networks PAN-OS=10.2.10-h3
Palo Alto Networks PAN-OS=10.2.10-h30
Palo Alto Networks PAN-OS=10.2.10-h31
Palo Alto Networks PAN-OS=10.2.10-h36
Palo Alto Networks PAN-OS=10.2.10-h37
Palo Alto Networks PAN-OS=10.2.10-h4
Palo Alto Networks PAN-OS=10.2.10-h5
Palo Alto Networks PAN-OS=10.2.10-h6
Palo Alto Networks PAN-OS=10.2.10-h7
Palo Alto Networks PAN-OS=10.2.13
Palo Alto Networks PAN-OS=10.2.13-h1
Palo Alto Networks PAN-OS=10.2.13-h10
Palo Alto Networks PAN-OS=10.2.13-h15
Palo Alto Networks PAN-OS=10.2.13-h16
Palo Alto Networks PAN-OS=10.2.13-h18
Palo Alto Networks PAN-OS=10.2.13-h2
Palo Alto Networks PAN-OS=10.2.13-h21
Palo Alto Networks PAN-OS=10.2.13-h22
Palo Alto Networks PAN-OS=10.2.13-h3
Palo Alto Networks PAN-OS=10.2.13-h4
Palo Alto Networks PAN-OS=10.2.13-h5
Palo Alto Networks PAN-OS=10.2.13-h7
Palo Alto Networks PAN-OS=10.2.16
Palo Alto Networks PAN-OS=10.2.16-h1
Palo Alto Networks PAN-OS=10.2.16-h4
Palo Alto Networks PAN-OS=10.2.16-h6
Palo Alto Networks PAN-OS=10.2.16-h7
Palo Alto Networks PAN-OS=10.2.16-h8
Palo Alto Networks PAN-OS=10.2.17
Palo Alto Networks PAN-OS=10.2.18-h1
Palo Alto Networks PAN-OS=10.2.18-h5
Palo Alto Networks PAN-OS=10.2.18-h6
Palo Alto Networks PAN-OS=10.2.18-h7
Palo Alto Networks PAN-OS>=11.1.0<11.1.4
Palo Alto Networks PAN-OS>=11.1.8<11.1.10
Palo Alto Networks PAN-OS>=11.1.11<11.1.13
Palo Alto Networks PAN-OS>=11.1.14<11.1.16
Palo Alto Networks PAN-OS=11.1.4
Palo Alto Networks PAN-OS=11.1.4-h1
Palo Alto Networks PAN-OS=11.1.4-h10
Palo Alto Networks PAN-OS=11.1.4-h11
Palo Alto Networks PAN-OS=11.1.4-h12
Palo Alto Networks PAN-OS=11.1.4-h13
Palo Alto Networks PAN-OS=11.1.4-h15
Palo Alto Networks PAN-OS=11.1.4-h17
Palo Alto Networks PAN-OS=11.1.4-h18
Palo Alto Networks PAN-OS=11.1.4-h2
Palo Alto Networks PAN-OS=11.1.4-h25
Palo Alto Networks PAN-OS=11.1.4-h27
Palo Alto Networks PAN-OS=11.1.4-h3
Palo Alto Networks PAN-OS=11.1.4-h32
Palo Alto Networks PAN-OS=11.1.4-h33
Palo Alto Networks PAN-OS=11.1.4-h34
Palo Alto Networks PAN-OS=11.1.4-h4
Palo Alto Networks PAN-OS=11.1.4-h5
Palo Alto Networks PAN-OS=11.1.4-h6
Palo Alto Networks PAN-OS=11.1.4-h7
Palo Alto Networks PAN-OS=11.1.4-h8
Palo Alto Networks PAN-OS=11.1.4-h9
Palo Alto Networks PAN-OS=11.1.5
Palo Alto Networks PAN-OS=11.1.6
Palo Alto Networks PAN-OS=11.1.6-h1
Palo Alto Networks PAN-OS=11.1.6-h10
Palo Alto Networks PAN-OS=11.1.6-h14
Palo Alto Networks PAN-OS=11.1.6-h17
Palo Alto Networks PAN-OS=11.1.6-h18
Palo Alto Networks PAN-OS=11.1.6-h19
Palo Alto Networks PAN-OS=11.1.6-h2
Palo Alto Networks PAN-OS=11.1.6-h20
Palo Alto Networks PAN-OS=11.1.6-h21
Palo Alto Networks PAN-OS=11.1.6-h22
Palo Alto Networks PAN-OS=11.1.6-h23
Palo Alto Networks PAN-OS=11.1.6-h25
Palo Alto Networks PAN-OS=11.1.6-h29
Palo Alto Networks PAN-OS=11.1.6-h3
Palo Alto Networks PAN-OS=11.1.6-h32
Palo Alto Networks PAN-OS=11.1.6-h33
Palo Alto Networks PAN-OS=11.1.6-h34
Palo Alto Networks PAN-OS=11.1.6-h4
Palo Alto Networks PAN-OS=11.1.6-h6
Palo Alto Networks PAN-OS=11.1.6-h7
Palo Alto Networks PAN-OS=11.1.10
Palo Alto Networks PAN-OS=11.1.10-h1
Palo Alto Networks PAN-OS=11.1.10-h10
Palo Alto Networks PAN-OS=11.1.10-h12
Palo Alto Networks PAN-OS=11.1.10-h21
Palo Alto Networks PAN-OS=11.1.10-h25
Palo Alto Networks PAN-OS=11.1.10-h26
Palo Alto Networks PAN-OS=11.1.10-h27
Palo Alto Networks PAN-OS=11.1.10-h28
Palo Alto Networks PAN-OS=11.1.10-h4
Palo Alto Networks PAN-OS=11.1.10-h5
Palo Alto Networks PAN-OS=11.1.10-h7
Palo Alto Networks PAN-OS=11.1.10-h9
Palo Alto Networks PAN-OS=11.1.13
Palo Alto Networks PAN-OS=11.1.13-h1
Palo Alto Networks PAN-OS=11.1.13-h2
Palo Alto Networks PAN-OS=11.1.13-h3
Palo Alto Networks PAN-OS=11.1.13-h5
Palo Alto Networks PAN-OS=11.1.13-h6
Palo Alto Networks PAN-OS=11.1.13-h7
Palo Alto Networks PAN-OS=11.1.13-h8
Palo Alto Networks PAN-OS>=11.2.0<11.2.4
Palo Alto Networks PAN-OS>=11.2.5<11.2.7
Palo Alto Networks PAN-OS>=11.2.8<11.2.10
Palo Alto Networks PAN-OS>=11.2.11<11.2.13
Palo Alto Networks PAN-OS=11.2.4
Palo Alto Networks PAN-OS=11.2.4-h1
Palo Alto Networks PAN-OS=11.2.4-h10
Palo Alto Networks PAN-OS=11.2.4-h11
Palo Alto Networks PAN-OS=11.2.4-h12
Palo Alto Networks PAN-OS=11.2.4-h14
Palo Alto Networks PAN-OS=11.2.4-h15
Palo Alto Networks PAN-OS=11.2.4-h17
Palo Alto Networks PAN-OS=11.2.4-h18
Palo Alto Networks PAN-OS=11.2.4-h2
Palo Alto Networks PAN-OS=11.2.4-h3
Palo Alto Networks PAN-OS=11.2.4-h4
Palo Alto Networks PAN-OS=11.2.4-h5
Palo Alto Networks PAN-OS=11.2.4-h6
Palo Alto Networks PAN-OS=11.2.4-h7
Palo Alto Networks PAN-OS=11.2.4-h8
Palo Alto Networks PAN-OS=11.2.4-h9
Palo Alto Networks PAN-OS=11.2.7
Palo Alto Networks PAN-OS=11.2.7-h1
Palo Alto Networks PAN-OS=11.2.7-h10
Palo Alto Networks PAN-OS=11.2.7-h11
Palo Alto Networks PAN-OS=11.2.7-h12
Palo Alto Networks PAN-OS=11.2.7-h13
Palo Alto Networks PAN-OS=11.2.7-h14
Palo Alto Networks PAN-OS=11.2.7-h15
Palo Alto Networks PAN-OS=11.2.7-h16
Palo Alto Networks PAN-OS=11.2.7-h17
Palo Alto Networks PAN-OS=11.2.7-h2
Palo Alto Networks PAN-OS=11.2.7-h3
Palo Alto Networks PAN-OS=11.2.7-h4
Palo Alto Networks PAN-OS=11.2.7-h7
Palo Alto Networks PAN-OS=11.2.7-h8
Palo Alto Networks PAN-OS=11.2.10
Palo Alto Networks PAN-OS=11.2.10-h1
Palo Alto Networks PAN-OS=11.2.10-h10
Palo Alto Networks PAN-OS=11.2.10-h2
Palo Alto Networks PAN-OS=11.2.10-h3
Palo Alto Networks PAN-OS=11.2.10-h4
Palo Alto Networks PAN-OS=11.2.10-h5
Palo Alto Networks PAN-OS=11.2.10-h6
Palo Alto Networks PAN-OS=11.2.10-h7
Palo Alto Networks PAN-OS=11.2.10-h8
Palo Alto Networks PAN-OS=11.2.10-h9
Palo Alto Networks PAN-OS>=12.1.2<12.1.4
Palo Alto Networks PAN-OS>=12.1.5<12.1.7
Palo Alto Networks PAN-OS=12.1.4
Palo Alto Networks PAN-OS=12.1.4-h2
Palo Alto Networks PAN-OS=12.1.4-h3
Palo Alto Networks PAN-OS=12.1.4-h5
Palo Alto Networks PAN-OS=12.1.4-h6
Palo Alto Networks PAN-OS=12.1.4-h7
Palo Alto Networks PAN-OS=12.1.7
Palo Alto Networks PAN-OS=12.1.7-h1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.1.8Fixed in 12.1.7-h2Fixed in 12.1.4-h8Fixed in 11.2.13Fixed in 11.2.10-h12Fixed in 11.2.7-h18Fixed in 11.2.4-h20Fixed in 11.1.16Fixed in 11.1.13-h9Fixed in 11.1.10-h30Fixed in 11.1.7-h8Fixed in 11.1.6-h35Fixed in 11.1.4-h35Fixed in 10.2.18-h8Fixed in 10.2.16-h9Fixed in 10.2.13-h23Fixed in 10.2.10-h39Fixed in 10.2.7-h36
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.7-h18Fixed in 10.2.10-h39
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.10-h39 or later
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.13-h23 or later
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.16-h9 or later
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.7-h36 or later
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.10-h30 or 11.1.16 or later
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.13-h9 or 11.1.16 or later
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.4-h35 or 11.1.16 or later
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.6-h35 or 11.1.16 or later
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.7-h8 or 11.1.16 or later
  12. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.10-h12 or 11.2.13 or later
  13. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.4-h20 or 11.2.13 or later
  14. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.7-h18 or 11.2.13 or later
  15. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.1.4-h8 or 12.1.8 or later
  16. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.18-h8 or later
  17. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.1.16 or later
  18. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.13 or later
  19. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.1.7-h2 or 12.1.8 or later
  20. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.2.7-h18 or later
  21. Compensating control

    Restrict User-ID Terminal Server Agent (TSA) connectivity to only trusted internal IP addresses (best practice deployment guidelines referenced in the provided text) to minimize security risk.

Event History

Jul 8, 2026
Advisory Published
via Palo Alto Networks·04:00 PM
Data Sourced
via Palo Alto Networks·04:00 PM
RemedyDescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·08:14 PM
Data Sourced
via MITRE·08:14 PM
DescriptionWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-0288?

The severity of CVE-2026-0288 is rated as critical with a score of 9.2.

2

How do I fix CVE-2026-0288?

To fix CVE-2026-0288, users should upgrade to the latest version of Palo Alto Networks PAN-OS or apply relevant patches provided by Palo Alto Networks.

3

What types of attacks can exploit CVE-2026-0288?

CVE-2026-0288 can be exploited to cause a denial of service (DoS) condition or potentially execute arbitrary code.

4

Who is affected by CVE-2026-0288?

Users of Palo Alto Networks PAN-OS and Prisma Access are affected by CVE-2026-0288.

5

What component is vulnerable in CVE-2026-0288?

The User-ID Terminal Server Agent (TSA) component of Palo Alto Networks PAN-OS is vulnerable in CVE-2026-0288.

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