Security readout for executives and security teams
Plain-English summary
This flaw lets a local Windows user potentially turn limited access into SYSTEM-level control on hosts running vulnerable Rapid7 Insight Agent versions. It is not described as remote or unauthenticated, but SYSTEM escalation on security-agent hosts can materially increase breach impact.
Executive priority
Treat this as a high-priority endpoint hygiene issue, especially where vulnerable agents run on shared or sensitive Windows systems. The urgency is lower than a remote unauthenticated flaw, but the post-compromise impact can be severe.
Technical view
Rapid7 Insight Agent 3.0.1 through 3.1.2.34 has CWE-427 uncontrolled DLL search path behavior. At startup, its Python interpreter attempts to load python3.dll from C:\DLLs\python3.dll, a location described as normally writable by locally authenticated users. Rapid7 fixed it in 3.1.2.35. The issue is a regression of CVE-2019-5629.
Likely exposure
Exposure is likely limited to Windows endpoints or servers running Rapid7 Insight Agent versions 3.0.1 through 3.1.2.34. The source bundle does not identify other Rapid7 products, non-Windows platforms, or cloud-only exposure.
Exploitation context
No provided source reports active exploitation, and the CVE is not marked as KEV. Exploitation requires local authenticated access and relevant agent startup conditions. Successful abuse could elevate privileges to SYSTEM, affecting confidentiality, integrity, and availability.
Researcher notes
Evidence is limited to the CVE record, Rapid7 release note reference, and the related CVE-2019-5629 reference. Do not assume public exploit availability or active abuse. Focus validation on version range, Windows host exposure, and confirmation that the fixed agent build is deployed.
Mitigation direction
- Upgrade Rapid7 Insight Agent to 3.1.2.35 or later.
- Prioritize shared systems, jump hosts, and servers with many local users.
- Confirm Rapid7 release notes for any environment-specific guidance.
- Review local-admin and interactive logon access on affected endpoints.
Validation and detection
- Inventory Rapid7 Insight Agent versions across Windows endpoints and servers.
- Flag any version from 3.0.1 through 3.1.2.34.
- Confirm upgraded hosts report version 3.1.2.35 or later.
- Check whether vulnerable hosts allow local authenticated user access.
- Review endpoint telemetry for unusual privilege escalation around agent startup.
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-427: 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-4007 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.rapid7.com/release-notes/insightagent/20211210/CVE reference · x_refsource_CONFIRM
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=2019-5629CVE 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.
Uncontrolled Search Path Element
Uncontrolled Search Path Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.