Security readout for executives and security teams
Plain-English summary
This issue could let someone who already has local access to Cisco SD-WAN vManage read sensitive database files. It is not a remote unauthenticated takeover, but it can expose high-value operational data if local accounts or shell access are not tightly controlled.
Executive priority
Treat this as a moderate-priority confidentiality risk. Prioritize it where vManage manages sensitive SD-WAN environments or where local administrative access is broadly assigned. Confirm vendor guidance before scheduling remediation.
Technical view
CVE-2021-1235 is an insufficient authorization flaw in Cisco SD-WAN vManage CLI. An authenticated local attacker who can access vshell may read database files from the underlying operating system. CVSS 3.0 is 5.5 with high confidentiality impact and no stated integrity or availability impact.
Likely exposure
Exposure is limited to organizations running Cisco SD-WAN vManage where an attacker already has authenticated local access and can access vshell. The source bundle lists affected versions as n/a, so version-level exposure cannot be determined from these sources alone.
Exploitation context
The provided sources do not support active exploitation, and KEV status is false. Exploitation requires local authenticated access with vshell access, which makes account governance and privileged access review central to risk reduction.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory reference. Affected versions and fixed releases are not provided in the source bundle. Do not infer remote exploitability; the vector is local, authenticated, low privilege, no user interaction.
Mitigation direction
- Review Cisco's advisory for affected and fixed release guidance.
- Inventory Cisco SD-WAN vManage deployments and installed versions.
- Restrict CLI and vshell access to required administrative users only.
- Review local accounts and remove unnecessary privileges.
- Monitor for unusual local shell access on vManage systems.
Validation and detection
- Confirm whether Cisco SD-WAN vManage is deployed in the environment.
- Compare installed versions against Cisco's advisory guidance.
- Review who has local CLI and vshell access.
- Check logs for unexpected local shell activity.
- Assess whether database file access is appropriately restricted.
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-497: 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1235 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
- Medium
- CVSS
- 5.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.5MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210120 Cisco SD-WAN vManage Information Disclosure 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.
Exposure of Sensitive System Information to an Unauthorized Control Sphere
Exposure of Sensitive System Information to an Unauthorized Control Sphere represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.