Security readout for executives and security teams
Plain-English summary
CVE-2026-0258 affects Palo Alto Networks PAN-OS firewalls. A remote unauthenticated attacker may make the firewall initiate unintended network requests through IKEv2 certificate URL handling, or trigger denial of service. The provided sources rate it medium, not critical, but availability impact can be high for exposed VPN/firewall services.
Executive priority
Treat as a scheduled but timely firewall maintenance item. Prioritize internet-facing VPN gateways and security appliances because denial of service against perimeter firewalls can affect remote access and network availability.
Technical view
This is a CWE-918 SSRF in PAN-OS IKEv2 certificate URL fetching. CVSS 4.0 is 4.8 with network attack vector, low complexity, no privileges, no user interaction, and high vulnerable-system availability impact. Panorama, Cloud NGFW, and Prisma Access are stated as not impacted.
Likely exposure
Exposure is most likely on PAN-OS firewalls running listed 10.2, 11.1, 11.2, or 12.1 releases where IKEv2 certificate URL fetching is reachable. Panorama, Cloud NGFW, and Prisma Access are not impacted according to the bundle.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. Exploitation is unauthenticated over the network, but the CVSS vector indicates attack requirements are present. Expected impact is forced outbound requests from the firewall and possible denial of service, not confirmed code execution.
Researcher notes
Evidence supports SSRF and DoS through IKEv2 certificate URL fetching, but the source bundle does not provide fixed version details, exploit indicators, or proof-of-concept status. Avoid assuming exploitability beyond unauthenticated network reachability and required IKEv2 conditions.
Mitigation direction
- Inventory PAN-OS firewall versions against the affected version data.
- Review Palo Alto Networks advisory for fixed releases and supported upgrade paths.
- Upgrade affected PAN-OS devices according to vendor guidance.
- Reduce unnecessary IKEv2 exposure where business requirements allow.
- Check Siemens advisory if Siemens-managed products include affected PAN-OS components.
Validation and detection
- Confirm whether each firewall runs PAN-OS 10.2, 11.1, 11.2, or 12.1 listed versions.
- Verify Panorama, Cloud NGFW, and Prisma Access are excluded from remediation scope.
- Review firewall logs for unusual outbound requests from IKEv2-related activity.
- Confirm post-upgrade PAN-OS versions match vendor fixed-release guidance.
- Document externally reachable IKEv2 services for prioritization.
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-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-0258 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
- Medium
- CVSS
- 4.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Amber
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
1 official scoreWe 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:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Amber——palo_altoVulnerability scoring details
Base CVSS 4.0 score
4.8MediumVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:H/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-2026-0258CVE 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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.