Security readout for executives and security teams
Plain-English summary
This flaw affects several Cisco Small Business RV routers. An attacker who already has administrative access to the router’s web management interface could crash the device or run code as root. The main business risk is loss of edge routing availability or full compromise of the router if admin access is abused.
Executive priority
Treat as high priority for branch, small office, or edge networks using these routers. The admin-privilege requirement reduces broad attack likelihood, but router compromise can disrupt connectivity and provide a strong foothold.
Technical view
CVE-2020-3290 is a stack overflow in scripts used by the web-based management interface of Cisco RV320, RV325, RV016, RV042, and RV082 routers. It is remotely reachable over the network, low complexity, requires high privileges, and may allow arbitrary code execution with root privileges or device crash.
Likely exposure
Exposure is limited to organizations running the listed Cisco Small Business RV router families, especially where web management is reachable over remote networks or admin credentials are weak, shared, or compromised.
Exploitation context
The provided sources describe authenticated remote exploitation requiring administrative privileges. KEV status is false, and the bundle provides no evidence of active exploitation. Impact is still serious because successful exploitation can affect confidentiality, integrity, and availability on the router.
Researcher notes
The public bundle does not provide affected firmware ranges, fixed versions, or proof-of-concept details. Validation should focus on model identification, management interface exposure, privilege controls, and Cisco advisory alignment. Avoid assuming unauthenticated exploitability.
Mitigation direction
- Identify whether any listed Cisco RV router models are deployed.
- Check Cisco’s advisory for affected firmware and vendor remediation guidance.
- Restrict web management access to trusted administrative networks only.
- Review administrative accounts and remove unnecessary privileged access.
- Monitor routers for unexpected crashes or configuration changes.
Validation and detection
- Inventory deployed Cisco RV320, RV325, RV016, RV042, and RV082 devices.
- Confirm each device’s firmware against Cisco advisory guidance.
- Verify web management is not exposed to untrusted networks.
- Review admin account list and recent management activity.
- Document compensating controls for devices awaiting vendor remediation.
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-2020-3290 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
- 7.2 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.2HighVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200617 Cisco Small Business RV Series Routers Stack Overflow Arbitrary Code Execution 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.