Security readout for executives and security teams
Plain-English summary
Cisco SD-WAN vManage had multiple authorization bypass flaws that could let a logged-in remote user do more than their permissions should allow. Business risk includes unauthorized configuration changes and exposure of sensitive management data in a core network control platform.
Executive priority
Prioritize this for Cisco SD-WAN environments because vManage controls important network configuration. It is not marked as known exploited in the supplied sources, but the potential impact is high enough to require prompt exposure review and vendor-guided remediation.
Technical view
CVE-2021-1304 affects Cisco SD-WAN vManage Software web-based management interface. The CVSS 3.1 score is 8.8, with network attack vector, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The source bundle does not list affected or fixed versions.
Likely exposure
Exposure is likely limited to organizations operating Cisco SD-WAN vManage. Risk is higher where authenticated users, integrations, or administrators can remotely reach the vManage web interface. The bundle does not provide version ranges, so teams must confirm affected releases through Cisco guidance.
Exploitation context
The source bundle says exploitation requires authentication and remote access to the web management interface. It does not provide evidence of public exploitation, and KEV is false. Treat it as serious because successful abuse could modify SD-WAN configuration or access restricted information.
Researcher notes
The public bundle identifies CWE-20 and describes authorization bypass in the vManage web UI, but omits specific endpoints, affected versions, fixed versions, and exploit indicators. Avoid assuming broader Cisco product impact beyond SD-WAN vManage.
Mitigation direction
- Review the Cisco advisory for affected and fixed vManage releases.
- Upgrade or remediate according to Cisco's official guidance.
- Limit vManage management access to trusted administrative networks.
- Review vManage user roles and remove unnecessary accounts or privileges.
- Monitor for unauthorized configuration changes and sensitive data access.
Validation and detection
- Inventory all Cisco SD-WAN vManage deployments and exposed management interfaces.
- Map each deployment's version against Cisco's advisory details.
- Confirm only authorized users can access the web management interface.
- Review audit logs for unexpected configuration changes or permission bypass indicators.
- Document remediation status and any compensating access controls.
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 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-2021-1304 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210120 Cisco SD-WAN vManage Authorization Bypass 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.