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UK Cyber Defence
VulnerabilityAwaiting Analysis

CVE-2026-79866

An unauthenticated path traversal vulnerability exists in the PAPI protocol in AOS-8.

CRITICAL 9.6EPSS 0.24%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

An unauthenticated path traversal vulnerability exists in the PAPI protocol in AOS-8. Successful exploitation of this vulnerability could allow an unauthenticated adjacent attacker to read, modify, and delete files on the underlying operating system.

CVSS 3.1
9.6 CRITICALCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
0.24% probability · 15th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Source
security-alert@hpe.com
EPSS trend
0%3%5%23 October 2026: 0.19%26 October 2026: 0.24%23 October 202626 October 2026

EPSS moved from 0.2% on 23 October 2026 to 0.2% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.