Security readout for executives and security teams
Plain-English summary
Cisco SD-WAN vManage had authorization bypass flaws in its web management interface. An attacker with valid low-level access could potentially change configuration, read sensitive information, or view data outside their permissions. This is high business risk because vManage controls SD-WAN infrastructure.
Executive priority
Treat this as a high-priority infrastructure management issue. The risk is not anonymous internet takeover from the supplied evidence, but compromise of any valid account could affect SD-WAN configuration and sensitive management data.
Technical view
CVE-2021-1305 covers multiple Cisco SD-WAN vManage web interface authorization bypass vulnerabilities. The CVSS 3.1 score is 8.8, with network access, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The source bundle maps the weakness to CWE-20.
Likely exposure
Exposure is most likely where Cisco SD-WAN vManage is deployed and reachable by authenticated users or compromised low-privilege accounts. The provided affected version data is incomplete, listed only as n/a.
Exploitation context
The source bundle supports an authenticated remote attack scenario. It does not provide exploit details, public exploitation evidence, or CISA KEV status; KEV is false in the supplied data.
Researcher notes
Evidence is limited to the CVE summary, CVSS vector, CWE mapping, and Cisco advisory reference. The bundle does not include exact affected or fixed versions, exploit maturity, or workaround details, so validation should anchor on the vendor advisory.
Mitigation direction
- Review Cisco’s advisory for affected and fixed release guidance.
- Apply Cisco-recommended updates or workarounds where applicable.
- Restrict vManage management access to trusted administrative networks.
- Review vManage user roles and remove unnecessary accounts.
- Monitor for unauthorized configuration changes or sensitive data access.
Validation and detection
- Inventory all Cisco SD-WAN vManage deployments.
- Compare deployed versions against Cisco advisory guidance.
- Confirm the web management interface is not broadly reachable.
- Review audit logs for unexpected configuration or access events.
- Validate that low-privilege users cannot access administrative functions.
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-2021-1305 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.