Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in remote user delete files outside intended WebDAV paths on affected Synology systems. The main business risk is disruption or data loss on NAS-backed services if a privileged account is misused or compromised.
Executive priority
Treat as high priority for Synology NAS environments using WebDAV, especially internet-reachable deployments. Patch and restrict access because successful exploitation can delete arbitrary files and disrupt business services.
Technical view
CVE-2022-22685 is a CWE-22 path traversal issue in Synology WebDAV Server before 2.4.0-0062. The source says remote authenticated users can delete arbitrary files through unspecified vectors. CVSS 3.1 is 8.7, with network attack vector, low complexity, high privileges required, no user interaction, and high integrity and availability impact.
Likely exposure
Organizations running Synology WebDAV Server earlier than 2.4.0-0062 are potentially exposed, especially if WebDAV is reachable from untrusted networks. The source does not specify exact vulnerable builds beyond before 2.4.0-0062.
Exploitation context
No KEV listing or cited source in the bundle indicates active exploitation. Attack requires network access and authenticated high privileges, with no user interaction. The reported consequence is arbitrary file deletion, affecting integrity and availability.
Researcher notes
The public bundle does not describe the affected endpoint, request shape, or deletion vector. Validation should focus on version exposure, authentication boundaries, privilege levels, and operational logs rather than attempting reproduction from incomplete public details.
Mitigation direction
- Upgrade Synology WebDAV Server to 2.4.0-0062 or later per Synology advisory.
- Restrict WebDAV exposure to trusted networks, VPN, or management segments.
- Review and reduce privileged WebDAV accounts where business use allows.
- Monitor Synology advisory for supplemental fixes or hardening guidance.
Validation and detection
- Inventory Synology systems running WebDAV Server and record package versions.
- Confirm no instance remains below WebDAV Server 2.4.0-0062.
- Check which users can authenticate to WebDAV with high privileges.
- Review logs for unusual WebDAV file deletion activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-22685 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H2.35.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.7HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/security/advisory/Synology_SA_21_09CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.