CVE-2026-17556: enterprise server before 3.17.19 (exclusive), from 3.18.0 (inclusive), before 3.18.13 (exclusive), from 3.19.0…

Affected technology

enterprise server · before 3.17.19 (exclusive)
github

enterprise server · from 3.18.0 (inclusive), before 3.18.13 (exclusive)
github

enterprise server · from 3.19.0 (inclusive), before 3.19.10 (exclusive)
github

enterprise server · from 3.20.0 (inclusive), before 3.20.6 (exclusive)
github

enterprise server · from 3.21.0 (inclusive), before 3.21.4 (exclusive)
github

Enterprise Server · 3.17.0 through 3.17.18; status changes: 3.17.19 — unaffected, 3.18.0 through 3.18.12; status changes: 3.18.13 — unaffected, 3.19.0 through 3.19.9; status changes: 3.19.10 — unaffected, 3.20.0 through 3.20.5; status changes: 3.20.6 — unaffected, 3.21.0 through 3.21.3; status changes: 3.21.4 — unaffected
GitHub

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 8.8/10) rates confidentiality impact as none; integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.