Security readout for executives and security teams
Plain-English summary
This CVE concerns Cisco SD-WAN vManage, a management component for SD-WAN environments. The source bundle says the advisory includes flaws that could lead to code execution or privilege escalation. A successful compromise could affect confidentiality, integrity, and availability of a central network management system.
Executive priority
Prioritize review and remediation if Cisco SD-WAN vManage is in use. This is a high-impact management-plane issue, but urgency should be calibrated to actual version exposure and absence of supplied active-exploitation evidence.
Technical view
CVE-2021-1137 is listed with CVSS 3.1 score 7.8, CWE-119, local attack vector, low complexity, low privileges, no user interaction, and high CIA impact. Cisco’s advisory groups it under multiple vManage software vulnerabilities, including arbitrary code execution and privilege escalation outcomes.
Likely exposure
Organizations running Cisco SD-WAN vManage software are the relevant exposure population. The bundle does not provide affected version ranges, CPEs, or fixed release details, so teams must verify applicability against Cisco’s advisory and their deployed vManage versions.
Exploitation context
The provided bundle does not indicate CISA KEV listing or cite active exploitation. The impact remains serious because vManage is a high-value management plane component, but exploitation status is not established from the supplied evidence.
Researcher notes
The bundle is incomplete for precise version mapping and remediation details. Treat the Cisco advisory as authoritative for affected releases, fixed software, and any caveats. Avoid assuming remote exploitability for this specific CVE beyond the advisory’s grouped vulnerability description.
Mitigation direction
- Review Cisco advisory cisco-sa-vmanage-YuTVWqy for affected and fixed releases.
- Inventory all Cisco SD-WAN vManage deployments and versions.
- Upgrade affected vManage systems according to Cisco guidance.
- Restrict vManage management access to trusted administrative networks.
- Review privileged local accounts and remove unnecessary access.
Validation and detection
- Confirm whether deployed vManage versions match Cisco’s affected versions.
- Verify systems are upgraded to Cisco-listed fixed software.
- Check management interfaces are not broadly exposed.
- Review vManage logs for unusual administrative or local privilege activity.
- Document compensating controls where immediate upgrade is not possible.
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-119: 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-2021-1137 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210407 Cisco SD-WAN vManage Software 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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.