Security readout for executives and security teams
Plain-English summary
CVE-2021-34745 lets a local authenticated Windows user escalate to SYSTEM on hosts running vulnerable Cisco AppDynamics .NET Agent. SYSTEM access can allow full host control, so exposed monitoring agents on servers or developer workstations should be prioritized for upgrade verification.
Executive priority
Treat this as high priority for Windows systems where AppDynamics is deployed. It is not described as remotely exploitable, but it can turn limited local access into full host control.
Technical view
The flaw is CWE-269 privilege escalation in AppDynamics .NET Agent for Windows. The .NET Agent Coordinator Service can launch attacker-created processes with SYSTEM privileges. CVSS 3.1 is 7.8 with local attack vector, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Windows devices running Cisco AppDynamics .NET Agent. The source bundle does not provide exact vulnerable version ranges, only that AppDynamics .NET Agent Release 21.7 fixes the issue.
Exploitation context
No KEV listing or cited source in the bundle indicates active exploitation. Exploitation requires local authenticated access, so this is mainly a post-compromise or insider-risk escalation issue rather than an internet-reachable remote entry point.
Researcher notes
The source evidence supports a local privilege escalation through the .NET Agent Coordinator Service. Exact affected versions are not specified beyond the fixed Release 21.7, so version validation should rely on vendor guidance and local inventory.
Mitigation direction
- Upgrade AppDynamics .NET Agent for Windows to Release 21.7 or later.
- Check Cisco AppDynamics advisory for any environment-specific guidance.
- Restrict local interactive access to monitored Windows hosts.
- Prioritize servers where local user compromise could become domain or production impact.
Validation and detection
- Inventory Windows hosts running AppDynamics .NET Agent.
- Confirm installed agent release is 21.7 or later.
- Flag hosts with older or unknown agent versions for remediation.
- Review endpoint telemetry for unexpected SYSTEM processes associated with the agent service.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2021-34745 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.appdynamics.com/display/PAA/Security+Advisory%3A+AppDynamics+.NET+Agent+Privilege+Escalation+VulnerabilityCVE 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 Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.