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

Quick assessment

Affected
Palo Alto Networks Cloud NGFW
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Palo Alto Networks pan-os是美国Palo Alto Networks公司的防火墙。 Palo Alto Networks PAN-OS存在缓冲区错误漏洞，该漏洞源于User-ID Terminal Server Agent (TSA)组件存在多个缓冲区溢出漏洞，可能导致未经身份验证的攻击者通过网络访问发送特制网络流量，造成拒绝服务或执行任意代码。以下版本受到影响：12.1.0版本至12.1.8之前版本、11.2.0版本至11.2.13之前版本、11.1.0版本至11.1.16之前版

CVSS 4.8 · Medium EPSS 0.83% · P56

Affected Version Matrix 7

VendorProduct Version RangeStatus
Palo Alto Networks Cloud NGFW All unaffected
Palo Alto Networks PAN-OS 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 affected
Palo Alto Networks Prisma Access 11.2.0< 11.2.7-h18 affected
10.2.0< 10.2.10-h39 affected
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I. Basic Information for CVE-2026-0288

Vulnerability Information
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Vulnerability Title
PAN-OS: Buffer Overflow Vulnerabilities in User-ID Terminal Server Agent
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:U/AU:N/R:U/V:D/RE:M/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Palo Alto Networks pan-os是美国Palo Alto Networks公司的防火墙。 Palo Alto Networks PAN-OS存在缓冲区错误漏洞，该漏洞源于User-ID Terminal Server Agent (TSA)组件存在多个缓冲区溢出漏洞，可能导致未经身份验证的攻击者通过网络访问发送特制网络流量，造成拒绝服务或执行任意代码。以下版本受到影响：12.1.0版本至12.1.8之前版本、11.2.0版本至11.2.13之前版本、11.1.0版本至11.1.16之前版
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Palo Alto Networks Cloud NGFW All -
Palo Alto Networks PAN-OS 12.1.0 ~ 12.1.8 cpe:2.3:o:palo_alto_networks:pan-os:12.1.7:h1:*:*:*:*:*:*
Palo Alto Networks Prisma Access 11.2.0 ~ 11.2.7-h18 -

II. Public POCs for CVE-2026-0288

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III. Intelligence Information for CVE-2026-0288

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Vendor Advisories for CVE-2026-0288 (2)

IV. Related Vulnerabilities

Same product: Cloud NGFW
Same vendor: Palo Alto Networks
Same weakness: CWE-787

V. Comments for CVE-2026-0288

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