Vulnerability · Published Mar 5, 2026 · Assigned by jpcert
CVE-2026-23767
Critical 9.8
In plain English
A critical-severity missing authentication in ESC/POS from Seiko Epson Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 57.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
ESC/POS, a printer control language designed by Seiko Epson Corporation, lacks mechanisms for user authentication and command authorization, does not provide controls to restrict sources or destinations of network communication, and transmits commands without encryption or integrity protection.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Seiko Epson Corporation | ESC/POS | All products implementing ESC/POS |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H