EUVD-2026-82776
GHSA-xphp-4p54-2792
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network LDAP API, low complexity, needs a low-privileged authenticated DSM user (PR:L); arbitrary file read/write and DoS give C:H/I:H/A:H with no scope change.
Primary rating from Vendor (synology).
CVSS VectorVendor: synology
Lifecycle Timeline
3DescriptionCVE.org
An incorrect permission assignment for critical resource vulnerability in LDAP API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks.
Articles & Coverage 1
AnalysisAI
Authenticated remote attackers holding low-privileged credentials can exploit an incorrect permission assignment in the LDAP API of Synology DiskStation Manager to read or write arbitrary files and to trigger denial-of-service conditions, giving full loss of confidentiality, integrity, and availability on affected systems per the assessed vector (CVSS 8.8, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The vulnerability affects DSM builds before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075, with realistic exposure concentrated in NAS deployments that expose the management interface and run directory-services/LDAP functionality. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires (1) a network-reachable DSM instance and (2) valid credentials for at least a low-privileged DSM user account (PR:L) - this is NOT unauthenticated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine priority for organizations running Synology NAS with directory-services enabled, though not a drop-everything emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch by upgrading DSM to the fixed build for your branch: 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, or 7.4-90075, as documented in Synology security advisory Synology_SA_26_13 (https://www.synology.com/en-global/security/advisory/Synology_SA_26_13). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Synology DSM instance and flag any running builds earlier than 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, or 7.4-90075; remove administrative and LDAP-facing interfaces from direct internet exposure by placing them behind VPN or an administrative jump host, and review logs for anomalous authenticated LDAP activity. …
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External POC / Exploit Code
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