Security readout for executives and security teams
Plain-English summary
CVE-2020-3530 lets a logged-in local user on Cisco IOS XR run a CLI command reserved for administrators. Successful use can damage disk integrity and restart the device. Risk is high for routing infrastructure, but the attacker needs valid credentials and local access.
Executive priority
Prioritize remediation for production routers or critical network infrastructure. The issue is not remotely unauthenticated, but a compromised low-privilege account could cause high-impact integrity and availability disruption.
Technical view
Incorrect source-code mapping of task group assignments for a specific IOS XR CLI command allowed read-permission users to issue a command requiring Administrator privileges. CVSS 3.1 is 8.4: local attack, low complexity, low privileges, no user interaction, high integrity and availability impact.
Likely exposure
Organizations running Cisco IOS XR Software may be exposed. The provided bundle does not list specific affected or fixed release numbers, so exposure must be confirmed against Cisco’s advisory and device software inventory.
Exploitation context
The bundle does not show CISA KEV status, and no cited source states active exploitation. Exploitation requires an authenticated local attacker with valid device credentials. Successful exploitation may invalidate disk integrity and cause a restart.
Researcher notes
Evidence identifies a task group authorization mapping flaw for one CLI command, but the source bundle does not name the command or affected release matrix. Avoid assuming exploit availability, remote reachability, or fixed versions beyond Cisco’s advisory.
Mitigation direction
- Check Cisco’s advisory for affected and fixed IOS XR releases.
- Upgrade or patch IOS XR according to Cisco guidance.
- Limit CLI access to trusted administrative users.
- Review read-only and low-privilege device accounts for business need.
- Monitor network devices for unexpected restarts or disk integrity issues.
Validation and detection
- Inventory Cisco IOS XR devices and running software versions.
- Compare versions against Cisco’s advisory and remediation guidance.
- Review local device user roles and task group assignments.
- Check logs for unauthorized use of privileged CLI operations.
- Confirm patched devices no longer expose the unauthorized command path.
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
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CWE-264: Exact CWE lookup
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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-2020-3530 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/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:C/C:N/I:H/A:H25.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200902 Cisco IOS XR Authenticated User 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.
Permissions, Privileges, and Access Controls
Permissions, Privileges, and Access Controls represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.