Security readout for executives and security teams
Plain-English summary
This vulnerability affects Synology Media Server before 1.8.1-2876. A remote attacker could exploit an SQL injection flaw in its CGI component to run unintended database commands. The assessed impact is limited but spans confidentiality, integrity, and availability.
Executive priority
Treat as a high-priority patching item for any exposed Synology Media Server deployment. Urgency is driven by remote unauthenticated reachability, not by confirmed active exploitation in the provided sources.
Technical view
CVE-2021-33180 is CWE-89 SQL injection in the Synology Media Server CGI component before 1.8.1-2876. CVSS 3.1 is 7.3: network-accessible, low complexity, no privileges, no user interaction, unchanged scope, with low C/I/A impact. The source does not specify the exact vector.
Likely exposure
Exposure is limited to environments running Synology Media Server versions earlier than 1.8.1-2876, especially where the service is reachable from untrusted networks.
Exploitation context
The provided sources do not show known active exploitation, and the CVE is not listed as KEV. CVSS indicates remote unauthenticated exploitability, but the public bundle describes only unspecified vectors.
Researcher notes
The advisory-backed record confirms SQL injection before 1.8.1-2876 but omits affected version ranges beyond “before,” exact parameters, and exploit details. Avoid assuming broader Synology product impact without vendor confirmation.
Mitigation direction
- Upgrade Synology Media Server to 1.8.1-2876 or later.
- Check Synology advisory Synology_SA_20_24 for current vendor guidance.
- Restrict Media Server access from untrusted networks until updated.
- Review exposure of Synology services at network boundaries.
Validation and detection
- Inventory Synology NAS devices running Media Server.
- Confirm installed Media Server version is 1.8.1-2876 or later.
- Identify any Media Server instances reachable from the internet.
- Review service logs for unusual CGI or database-related errors.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-33180 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
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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:U/C:L/I:L/A:L3.93.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.