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Back to active CVEs
Medium · CVSS 4.6CVE-2026-0269

PAN-OS: Denial of Service (DoS) in Tunnel Traffic ProcessingCVE-2026-0269

Answer in brief

CVE-2026-0269 records a Medium severity (CVSS 4.6) vulnerability in PAN-OS: Denial of Service (DoS) in Tunnel Traffic Processing. The current sources do not mark it as known exploited. The current feed maps Palo Alto Networks/PAN-OS (generic), Siemens/RUGGEDCOM APE1808 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 10, 2026Updated Oct 15, 2026Source checked Nov 3, 2026First seen by HOL Jul 13, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.6
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 4.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Palo Alto Networks/PAN-OS (generic), Siemens/RUGGEDCOM APE1808 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Palo Alto Networks/PAN-OSgeneric>=12.1.0 <12.1.5 || >=11.2.0 <11.2.10 || >=11.1.0 <11.1.6-h21 || >=10.2.0 <10.2.16-h612.1.5, 11.2.10, 11.1.6-h21, 10.2.16-h6
Siemens/RUGGEDCOM APE1808generic>=0 <**

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Palo Alto Networks/PAN-OS, Siemens/RUGGEDCOM APE1808.
  2. 2Review the reported fix. Update Palo Alto Networks/PAN-OS to 12.1.5; Siemens/RUGGEDCOM APE1808 to * if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  3. First seen by HOL

    Jul 13, 2026

Sources and claim methodology

  • Source referencecert-portal.siemens.com
  • Source referencesecurity.paloaltonetworks.com
Upstream source description

A memory corruption vulnerability in the processing of tunnel traffic in Palo Alto Networks PAN-OS® software allows an authenticated user to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-754
Source
CVE List V5
Source checked
Nov 3, 2026
References
2 linked sources
Open source record