Security readout for executives and security teams
Plain-English summary
JetBrains TeamCity before 2021.1.1 had insufficient authentication checks for agent requests. In business terms, a CI/CD control plane may have accepted some agent-related requests without the intended authentication assurance. The public sources do not provide severity, exploit details, or confirmed impact, so urgency should be based on whether older TeamCity remains in use.
Executive priority
Prioritize verification if TeamCity supports software delivery or deployment pipelines. Without severity or exploitation evidence, this is not source-supported as an emergency, but outdated CI/CD infrastructure can create business risk if authentication boundaries are weak.
Technical view
CVE-2021-37545 concerns JetBrains TeamCity versions before 2021.1.1, where agent requests did not receive sufficient authentication checks. The bundle does not provide CVSS, CWE, vulnerable endpoint details, required privileges, or impact boundaries. Because TeamCity agents participate in CI/CD workflows, exposure should be assessed on TeamCity servers accepting agent communications.
Likely exposure
Organizations running JetBrains TeamCity before 2021.1.1 are the only affected population identified. Exposure depends on whether agent request handling is reachable from trusted or untrusted networks; the bundle does not specify attack prerequisites or affected configurations beyond the version boundary.
Exploitation context
The provided data says this CVE is not in CISA KEV and includes no source reporting active exploitation. The bundle also lacks public exploit mechanics, observed abuse, or indicators. Treat exploitation status as unconfirmed, not absent.
Researcher notes
The public record is sparse. It establishes product, fixed version boundary, and authentication-check weakness for agent requests, but not CVSS, CWE, affected endpoints, privileges, or impact. Avoid claiming RCE, data exposure, or exploitability without additional vendor evidence.
Mitigation direction
- Identify all JetBrains TeamCity servers and record their exact versions.
- Upgrade TeamCity installations older than 2021.1.1 to 2021.1.1 or later.
- Review JetBrains security bulletin guidance for any product-specific instructions.
- Restrict TeamCity server and agent communication paths to trusted networks where possible.
- Monitor TeamCity authentication and agent-related logs for unexpected activity.
Validation and detection
- Confirm no production TeamCity server reports a version earlier than 2021.1.1.
- Inventory configured TeamCity agents and validate they are expected and authorized.
- Check network controls around TeamCity server and agent communication paths.
- Review recent TeamCity logs for failed, anomalous, or unknown agent requests.
- Document remediation status and any compensating controls for older instances.
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.
CVE-2021-37545 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.jetbrains.com/blog/2021/08/05/jetbrains-security-bulletin-q2-2021/CVE 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.