Security readout for executives and security teams
Plain-English summary
CVE-2020-27660 is a critical SQL injection flaw in Synology Safe Access. An unauthenticated attacker on an adjacent network could use the vulnerable request.cgi domain handling to run SQL commands, risking data exposure, tampering, or service disruption. Systems running Safe Access before 1.2.3-0234 should be treated as urgent upgrade targets.
Executive priority
Prioritize remediation for any Synology device running Safe Access before 1.2.3-0234. The vulnerability can affect confidentiality, integrity, and availability, and requires no authentication or user interaction within the stated network scope.
Technical view
The issue is CWE-89 SQL injection in request.cgi in Synology Safe Access before 1.2.3-0234. The CVSS 3.1 score is 9.6 with adjacent-network attack vector, low complexity, no privileges, no user interaction, scope change, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Synology environments using Safe Access versions before 1.2.3-0234, especially where the service is reachable from adjacent, guest, or otherwise untrusted local networks.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Public references include a Talos vulnerability report and a GitHub repository, so technical details may be publicly available.
Researcher notes
Evidence supports SQL injection via the domain parameter in request.cgi. The CVSS adjacent-network vector matters for scoping exposure. Do not assume internet-wide reach or active exploitation without additional evidence beyond the provided sources.
Mitigation direction
- Upgrade Synology Safe Access to 1.2.3-0234 or later.
- Review Synology advisory Synology_SA_20_25 for current vendor guidance.
- Restrict Safe Access and management interfaces to trusted networks only.
- Segment guest or untrusted adjacent networks away from Synology services.
- Monitor Synology logs for suspicious Safe Access or request.cgi activity.
Validation and detection
- Inventory Synology devices with Safe Access installed.
- Confirm installed Safe Access version is 1.2.3-0234 or later.
- Check whether Safe Access is reachable from guest or untrusted local networks.
- Review advisory coverage against each device model and package state.
- Look for unusual Safe Access errors or database-related events in logs.
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-2020-27660 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
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/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:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H2.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:A/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_25CVE reference · x_refsource_CONFIRM
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087CVE reference · x_refsource_MISC
- https://github.com/thomasfady/Synology_SA_20_25CVE reference · x_refsource_MISC
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.