Security readout for executives and security teams
Plain-English summary
Roon Server had an authentication weakness that could let a remote attacker access resources that should require proper authentication. Roon Labs fixed it in Roon Server dated 2021-05-18 and later. The public record does not identify active exploitation or a complete vulnerable version range.
Executive priority
Treat this as a high-priority confidentiality issue for any environment running Roon Server. Prioritize confirming versions and upgrading older deployments. Urgency increases if the server is exposed beyond a trusted local network.
Technical view
CVE-2021-28810 is a network-exploitable CWE-290 issue in Roon Server. CVSS 3.1 is 7.5: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. The described impact is unauthorized access to otherwise protected resources, with confidentiality impact only in the published vector.
Likely exposure
Exposure is likely limited to Roon Server deployments running versions before the 2021-05-18 fixed release. Risk is higher where the service is reachable from untrusted networks. Sources do not provide CPEs, platforms, or exact vulnerable version boundaries.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. The CVSS vector indicates remote, unauthenticated exploitation with low attack complexity and no user interaction, but public exploit details are not included here.
Researcher notes
Evidence is sparse but consistent: affected product is Roon Server, weakness class is CWE-290, and the stated fix is Roon Server 2021-05-18 or later. The public bundle does not include exploit mechanics, affected CPEs, or integrity/availability impact.
Mitigation direction
- Upgrade Roon Server to version 2021-05-18 or later.
- Review the QNAP/Roon advisory for deployment-specific vendor guidance.
- Reduce untrusted network access to Roon Server while upgrades are completed.
- Track vendor advisories for any clarified affected version ranges.
Validation and detection
- Inventory all Roon Server deployments and record installed versions.
- Confirm each deployment is version 2021-05-18 or later.
- Identify whether any Roon Server instance is reachable from untrusted networks.
- Check vulnerability records for missing CPEs or clarified version data.
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-290: 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 lookupCVE-2021-28810 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qnap.com/zh-tw/security-advisory/qsa-21-17CVE 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.
Authentication Bypass by Spoofing
Authentication Bypass by Spoofing represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.