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Palo Alto Networks

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

CVE-2026-0257

What this means

This is rated high severity (7.8 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Paloaltonetworks Pan Os is in your estate, and treat that as the priority.

Full vendor description

Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.

Scoring and exploitation

7.8/ 10
CVSS 4.0 base scoreHigh

Exploitable over the network without any account, and no one has to click or open anything. High impact on subsequent confidentiality and subsequent integrity; low on confidentiality.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:Red

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Attack requirementsNoneAT:N
Privileges requiredNonePR:N
User interactionNoneUI:N

Impact

Longer bar: more harm

ConfidentialityLowVC:L
IntegrityNoneVI:N
AvailabilityNoneVA:N
Subsequent confidentialityHighSC:H
Subsequent integrityHighSI:H
Subsequent availabilityNoneSA:N
Elevated attack likelihood (~95.6% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Known
Listed product
Palo Alto Networks PAN-OS

Weaknesses

CWE-565

Affected products ()

  • Paloaltonetworks Pan Os
Show the raw CPE strings (40)
  • cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:-:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h1:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h12:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h16:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h18:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h19:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h21:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h24:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h3:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h32:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h6:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h8:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.8:*:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.9:*:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:-:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h10:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h12:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h14:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h17:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h18:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h2:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h21:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h27:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h3:*:*:*:*:*:*

Showing 25 of 40 matches from .

References

3 links from the CVE record, grouped by site; the vendor's advisory comes first.

Related feed events

  • Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257 (Updated October 19)

    Type Vulnerability

    Palo Alto Networks PAN-OS Authentication Bypass Vulnerability reported with confirmed exploitation in the wild. Known-exploited catalogue reports exploitation in the wild.

    Next step: Confirm whether Palo Alto Networks PAN-OS is in your estate.

    Who's reporting

    Official authority missing. no OfficialVendor statement missing. no VendorResearcher coverage missing. no Researcher

    No corroborated perspectives yet. Treat claims cautiously.

    Palo Alto Networks PAN-OS
    CVE-2026-0257

  • Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257 (Updated October 19)

    Type Vulnerability

    Palo Alto Networks PAN-OS has a confirmed authentication bypass vulnerability identified as CVE-2026-0257. Known-exploited catalogue reports exploitation in the wild.

    Next step: Confirm whether Palo Alto Networks PAN-OS is in your estate.

    Who's reporting

    Official authority missing. no OfficialVendor statement missing. no VendorResearcher coverage missing. no Researcher

    No corroborated perspectives yet. Treat claims cautiously.

    Palo Alto Networks PAN-OS
    CVE-2026-0257

  • Qilin Hits Palo Alto VPN Flaw [2026] - https://tech-insider.org/

    Type Vulnerability

    Alleged Qilin ransomware leader extradited from Japan to face charges in Germany Computing UK CVE-2026-0257 is confirmed as exploited in the wild (US known-exploited catalogue) CVE-2026-0257 has an…

    Next step: Confirm whether Palo Alto Networks PAN-OS is in your estate.

    Who's reporting

    Official authority missing. no OfficialVendor statement missing. no VendorResearcher coverage missing. no Researcher

    No corroborated perspectives yet. Treat claims cautiously.

    Palo Alto Networks PAN-OS
    CVE-2026-0257