Security readout for executives and security teams
Plain-English summary
Synology DSM had a SQL injection flaw in Log Management before version 7.0.1-42218-2. An attacker with high privileges could remotely interfere with database-backed log functions, potentially affecting confidentiality, integrity, and availability at a limited level.
Executive priority
Prioritize remediation during the next normal patch cycle, sooner for exposed or shared administrative environments. The issue is credible but not currently evidenced as exploited in the provided sources.
Technical view
CVE-2021-43926 is CWE-89 SQL injection in Synology DiskStation Manager Log Management. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L, indicating network reachability, low attack complexity, no user interaction, but high privileges required.
Likely exposure
Exposure is limited to Synology DiskStation Manager deployments running versions before 7.0.1-42218-2. The source bundle does not identify specific models, endpoints, parameters, or whether internet-facing systems are commonly affected.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. Practical risk depends on whether attackers can obtain high-privilege DSM access and reach the vulnerable Log Management functionality.
Researcher notes
The public description leaves vectors unspecified, so validation should stay version- and access-control-based unless Synology publishes further detail. Do not infer affected NAS models or exploitability beyond DSM before 7.0.1-42218-2.
Mitigation direction
- Upgrade Synology DSM to 7.0.1-42218-2 or later.
- Review Synology advisory Synology_SA_22_01 for product-specific guidance.
- Restrict administrative DSM access to trusted networks and users.
- Audit privileged DSM accounts and remove unnecessary access.
Validation and detection
- Inventory Synology DSM systems and record installed DSM versions.
- Flag DSM versions earlier than 7.0.1-42218-2 as affected.
- Confirm Log Management access is limited to required privileged users.
- Review DSM logs for unusual privileged Log Management 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-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-2021-43926 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
- Medium
- CVSS
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:N/S:U/C:L/I:L/A:L1.23.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/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_22_01CVE 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.