Security readout for executives and security teams
Plain-English summary
CVE-2021-1299 covers multiple Cisco SD-WAN command injection flaws. An attacker who already has a low-privileged authenticated account could send network-accessible input that makes an affected device run commands with root privileges. That creates serious risk to SD-WAN control and management infrastructure.
Executive priority
Treat this as high priority if Cisco SD-WAN is deployed. The issue requires credentials, but the potential impact is root-level control over SD-WAN infrastructure, which can affect network trust, traffic handling, and operational integrity.
Technical view
The CVE is rated CVSS 8.1 high: network attack vector, low complexity, low privileges required, no user interaction, unchanged scope, high confidentiality and integrity impact, and no availability impact. Cisco maps the issue to CWE-20, indicating improper input validation leading to command injection in Cisco SD-WAN products.
Likely exposure
Exposure is most likely in environments running Cisco SD-WAN Solution components where authenticated administrative or operational access is reachable over the network. The provided bundle does not include a version matrix, so affected release validation must come from Cisco’s advisory.
Exploitation context
The source bundle does not state active exploitation, and the CVE is not marked as CISA KEV. The attacker must be authenticated with low privileges, but successful abuse could result in root-privileged command execution on affected devices.
Researcher notes
Do not assume unauthenticated exploitation or public exploitation from the provided evidence. Key missing details are affected versions, fixed versions, and Cisco’s per-vulnerability detail section. Use the vendor advisory as the controlling source for exposure confirmation and remediation.
Mitigation direction
- Review Cisco’s advisory for affected releases and fixed software guidance.
- Prioritize remediation for internet-reachable or broadly reachable SD-WAN management surfaces.
- Restrict SD-WAN administrative access to trusted networks and approved administrators.
- Remove stale low-privileged SD-WAN accounts and enforce least privilege.
- Monitor SD-WAN administrative activity for unexpected authenticated actions.
Validation and detection
- Inventory Cisco SD-WAN Solution components and management endpoints.
- Compare installed releases against Cisco’s advisory version guidance.
- Confirm whether low-privileged authenticated users can reach affected management interfaces.
- Review SD-WAN admin logs for unusual actions by non-admin accounts.
- Verify remediation status through vendor-supported version or configuration checks.
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 lookupCVE-2021-1299 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
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210120 Cisco SD-WAN Command Injection VulnerabilitiesCVE 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.