CVE-2026-0288Network attack vector

Unauthenticated code execution via TSA buffer overflows

Published Jul 8, 2026 · Updated Jul 8, 2026

Buffer overflows in Palo Alto Networks PAN-OS User-ID TSA allow remote attackers to crash devices or execute arbitrary code via crafted traffic. Palo Alto Networks has not disclosed the specific parser or field, only that the TSA component performs out-of-bounds writes while processing specially crafted network traffic. Exposure requires at least one configured TSA entry; restricting its IP and port to trusted internal addresses limits reachability.

CVSS severity9.2
Critical
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflows in Palo Alto Networks PAN-OS User-ID TSA allow remote attackers to crash devices or execute arbitrary code via crafted traffic. Palo Alto Networks has not disclosed the specific parser or field, only that the TSA component performs out-of-bounds writes while processing specially crafted network traffic. Exposure requires at least one configured TSA entry; restricting its IP and port to trusted internal addresses limits reachability.

The record

CVE
CVE-2026-0288
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Palo Alto Networks
Product
PAN-OS
Classifications
CWE-787, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2.0 <10.2.7-h36 changes=[{"at":"10.2.18-h8","status":"unaffected"},{"at":"10.2.16-h9","status":"unaffected"},{"at":"10.2.13-h23","status":"unaffected"},{"at":"10.2.10-h39","status":"unaffected"},{"at":"10.2.7-h36","status":"unaffected"}]
  2. Affected versionversion=11.1.0 <11.1.16 changes=[{"at":"11.1.16","status":"unaffected"},{"at":"11.1.13-h9","status":"unaffected"},{"at":"11.1.10-h30","status":"unaffected"},{"at":"11.1.7-h8","status":"unaffected"},{"at":"11.1.6-h35","status":"unaffected"},{"at":"11.1.4-h35","status":"unaffected"}]
  3. Affected versionversion=11.2.0 <11.2.13 changes=[{"at":"11.2.13","status":"unaffected"},{"at":"11.2.10-h12","status":"unaffected"},{"at":"11.2.7-h18","status":"unaffected"},{"at":"11.2.4-h20","status":"unaffected"}]
  4. Affected versionversion=12.1.0 <12.1.8 changes=[{"at":"12.1.8","status":"unaffected"},{"at":"12.1.7-h2","status":"unaffected"},{"at":"12.1.4-h8","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Palo Alto Networks · PAN-OSversion=10.2.0 <10.2.7-h36 changes=[{"at":"10.2.18-h8","status":"unaffected"},{"at":"10.2.16-h9","status":"unaffected"},{"at":"10.2.13-h23","status":"unaffected"},{"at":"10.2.10-h39","status":"unaffected"},{"at":"10.2.7-h36","status":"unaffected"}]; version=11.1.0 <11.1.16 changes=[{"at":"11.1.16","status":"unaffected"},{"at":"11.1.13-h9","status":"unaffected"},{"at":"11.1.10-h30","status":"unaffected"},{"at":"11.1.7-h8","status":"unaffected"},{"at":"11.1.6-h35","status":"unaffected"},{"at":"11.1.4-h35","status":"unaffected"}]; version=11.2.0 <11.2.13 changes=[{"at":"11.2.13","status":"unaffected"},{"at":"11.2.10-h12","status":"unaffected"},{"at":"11.2.7-h18","status":"unaffected"},{"at":"11.2.4-h20","status":"unaffected"}]; version=12.1.0 <12.1.8 changes=[{"at":"12.1.8","status":"unaffected"},{"at":"12.1.7-h2","status":"unaffected"},{"at":"12.1.4-h8","status":"unaffected"}]
Palo Alto Networks · Cloud NGFWAffected versions are unavailable in this record.
Palo Alto Networks · Prisma Accessversion=10.2.0 <10.2.10-h39 changes=[{"at":"10.2.10-h39","status":"unaffected"}]; version=11.2.0 <11.2.7-h18 changes=[{"at":"11.2.7-h18","status":"unaffected"}]

Published CVSS scores

5.2Palo Alto NetworksCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:U
4.8Palo Alto NetworksCVSS: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
7.5Palo Alto NetworksCVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
7.2Palo Alto NetworksCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:U
9.2Palo Alto NetworksCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
7.7Palo Alto NetworksCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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