Security readout for executives and security teams
Plain-English summary
CVE-2026-0264 is a high-severity PAN-OS flaw in DNS proxy and DNS Server handling. A remote unauthenticated attacker with network access could crash affected firewalls, and on PA-Series hardware may be able to run arbitrary code. Panorama, Cloud NGFW, and Prisma Access are listed as not impacted.
Executive priority
Prioritize remediation for internet- or broadly reachable PAN-OS firewalls using DNS proxy or DNS Server, especially PA-Series hardware. The business risk is firewall outage and possible device compromise, but current supplied evidence does not confirm active exploitation.
Technical view
The issue is a heap-based buffer overflow, CWE-122, in PAN-OS DNS proxy and DNS Server features. The CVSS 4.0 score is 7.2 with network attack vector, no privileges, no user interaction, high complexity, and high confidentiality, integrity, and availability impact on the vulnerable system.
Likely exposure
Exposure is most likely where PAN-OS 10.2, 11.1, 11.2, or 12.1 deployments use DNS proxy or DNS Server features and accept relevant network traffic. PA-Series hardware has the stated potential code-execution impact; other impacted PAN-OS platforms face DoS risk.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector marks exploitation as unproven and high complexity. Treat this as urgent because the vulnerable service is network-reachable and affects firewall infrastructure, but do not assume exploitation without new vendor or KEV evidence.
Researcher notes
Key constraints are feature exposure and platform. The advisory distinguishes DoS impact across affected PAN-OS platforms from potential arbitrary code execution on PA-Series hardware only. Available evidence does not name exploit details or independent exploitation reports, so validation should focus on version, feature enablement, reachability, and vendor fix status.
Mitigation direction
- Review Palo Alto Networks advisory for fixed PAN-OS releases and upgrade guidance.
- Prioritize PA-Series hardware using DNS proxy or DNS Server features.
- Restrict network reachability to DNS proxy or DNS Server where operationally possible.
- Confirm Panorama, Cloud NGFW, and Prisma Access are excluded before spending remediation effort.
- Monitor Palo Alto Networks and Siemens advisories for updated mitigation details.
Validation and detection
- Inventory PAN-OS versions across firewall estates, including hardware model and platform type.
- Identify devices with DNS proxy or DNS Server features enabled.
- Check whether affected devices match vendor-listed vulnerable PAN-OS branches and releases.
- Verify whether relevant DNS traffic can reach those device services.
- Track remediation status against Palo Alto Networks advisory guidance.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-0264 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red——palo_altoCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:A/V:D/RE:M/U:Amber——palo_altoVulnerability scoring details
Base CVSS 4.0 score
7.2HighVector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red
Base CVSS 4.0 score
6.6MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:A/V:D/RE:M/U:Amber
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelinepalo_alto
Initial Publication.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://security.paloaltonetworks.com/CVE-2026-0264CVE reference, palo_alto · vendor-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-967325.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.