Security readout for executives and security teams
Plain-English summary
This affects Cisco ASR 5000 Series devices running StarOS. A person who already has administrator access on the device could abuse CLI command handling to gain root-level control. It is not described as unauthenticated remote exploitation, but it matters where these routers support critical network operations.
Executive priority
Treat as a targeted operational risk, not a broad internet-scale emergency. Remediate on critical routing infrastructure and tighten administrator access because successful abuse gives root-level control.
Technical view
The vulnerability is insufficient input validation in the StarOS CLI. An authenticated local attacker with valid administrative credentials could submit crafted CLI commands and execute arbitrary code as root. CVSS 3.1 is 4.4 with local access and high privileges required.
Likely exposure
Exposure is limited to environments operating Cisco ASR 5000 Series Software with StarOS and allowing administrative CLI access. Risk is highest where many operators, contractors, or automation accounts hold device admin credentials.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation evidence. Exploitation requires valid administrative credentials on the affected device, which narrows access but creates serious impact after credential compromise or insider misuse.
Researcher notes
Key constraints are AV:L and PR:H. The vulnerability maps to CWE-20 and affects CLI command validation. The supplied bundle does not provide exploit details, affected version ranges, or specific fixed releases, so validation should anchor on Cisco's advisory.
Mitigation direction
- Review Cisco's advisory for affected and fixed StarOS releases.
- Restrict StarOS CLI administration to trusted, named accounts.
- Remove stale administrator and contractor accounts from affected devices.
- Increase monitoring for unusual privileged CLI activity.
- Prioritize remediation for internet-critical or carrier-core deployments.
Validation and detection
- Inventory Cisco ASR 5000 Series devices running StarOS.
- Compare installed StarOS versions with Cisco advisory guidance.
- Review who has administrative CLI access to each device.
- Check logs for unexpected privileged CLI command activity.
- Confirm this CVE is not present in CISA KEV sources before claiming exploitation.
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-20: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program 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-2020-3601 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
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N0.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20201007 Cisco StarOS Privilege Escalation VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.