Advisory Details

April 15th, 2026

(Pwn2Own) HP DeskJet 2855e JobStatusEvent Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2026-4682
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	HP
AFFECTED PRODUCTS	DeskJet 2855e
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of HP DeskJet 2855e printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of SOAP requests. When handling a JobStatusEvent, the process does not properly validate the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	HP has issued an update to correct this vulnerability. More details can be found at: https://support.hp.com/us-en/document/ish_14744451-14744475-16/hpsbpi04110
DISCLOSURE TIMELINE	2025-11-06 - Vulnerability reported to vendor 2026-04-15 - Coordinated public release of advisory 2026-04-15 - Advisory Updated
CREDIT	Team Neodyme (@Neodyme)

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