Security readout for executives and security teams
Plain-English summary
Synology Media Server before 1.8.1-2876 has a critical buffer overflow that could let a remote, unauthenticated attacker run arbitrary code. For an exposed NAS, this is high business risk because compromise can affect stored media, the device, and potentially adjacent network access.
Executive priority
Treat this as urgent for any Synology Media Server deployment reachable by untrusted users. Patch or isolate affected systems quickly, then verify exposure and logs.
Technical view
CVE-2022-22683 is a CWE-120 classic buffer overflow in the CGI component of Synology Media Server before 1.8.1-2876. The CVSS 3.1 score is 10.0: network reachable, low complexity, no privileges, no user interaction, scope changed, and high confidentiality, integrity, and availability impact. Vectors are unspecified in the provided sources.
Likely exposure
Organizations using Synology NAS devices with Media Server installed and running a version before 1.8.1-2876 are potentially exposed, especially if the service is reachable from untrusted networks or the internet.
Exploitation context
The provided sources state remote arbitrary code execution is possible, but do not describe public exploitation details. CISA KEV status is false in the bundle, so active exploitation should not be claimed from these sources.
Researcher notes
The vulnerability is clearly classified as a CGI component buffer overflow with RCE impact, but the public bundle omits specific vectors, affected CPEs, and exploit detail. Avoid assuming exploitability conditions beyond the CVSS vector and vendor advisory.
Mitigation direction
- Update Synology Media Server to 1.8.1-2876 or later.
- Review the Synology advisory for product-specific upgrade guidance.
- Restrict Media Server access to trusted networks until patched.
- Remove or disable Media Server where it is not required.
Validation and detection
- Inventory Synology NAS devices running Media Server.
- Confirm installed Media Server versions are 1.8.1-2876 or later.
- Review firewall and router rules for external Media Server exposure.
- Check NAS logs for unexpected Media Server or CGI access.
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-120: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-22683 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
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/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:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/security/advisory/Synology_SA_20_24CVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.