🛡️ CVE-2026-0257 — pan-os

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: None.

Weakness class

CVE-2026-0257 is classified as CWE-565: Reliance on Cookies without Validation. Security decisions are based on cookie values that the client can freely modify.

Affected software

CVE-2026-0257 is recorded against 3 packages.

• pan-os
• prisma-access
• ruggedcom-ape1808-firmware

Timeline and source

Published on 13 May 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

security.paloaltonetworks.com
cert-portal.siemens.com
www.cisa.gov

Other advisories for this package

pan-os has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-0284 (9.9 Critical, published 9 Jul 2026)
• CVE-2026-0283 (7.2 High, published 9 Jul 2026)
• CVE-2026-0282 (6.5 Medium, published 9 Jul 2026)
• CVE-2026-0281 (7.1 High, published 9 Jul 2026)
• CVE-2026-0287 (7.5 High, published 9 Jul 2026)
• CVE-2026-0280 (7.2 High, published 9 Jul 2026)
• CVE-2026-0286 (7.2 High, published 9 Jul 2026)
• CVE-2026-0279 (6.1 Medium, published 9 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-565: Reliance on Cookies without Validation) in other software:

• CVE-2026-53871 (8.1 High, published 17 Jun 2026)
• CVE-2026-8337 (5.3 Medium, published 22 May 2026)
• CVE-2026-39963 (6.9 Medium, published 15 Apr 2026)
• CVE-2026-5130 (8.8 High, published 30 Mar 2026)
• CVE-2022-50926 (9.8 Critical, published 13 Jan 2026)
• CVE-2025-65212 (9.8 Critical, published 6 Jan 2026)
• CVE-2025-14440 (9.8 Critical, published 13 Dec 2025)
• CVE-2025-64447 (8.1 High, published 9 Dec 2025)

Details

Affected Packages

References