Security readout for executives and security teams
Plain-English summary
Cisco Small Business RV016, RV042, RV082, RV320, and RV325 routers have web management flaws that let a logged-in administrator send oversized input that can crash the router or run code as root. This is high risk where these legacy routers remain deployed, especially if admin access is broadly reachable or credentials are weak.
Executive priority
Treat this as a high-priority edge-device risk if these routers remain in production. It can enable full device compromise, but requires administrator-level access, so urgency depends on exposure of management access and credential controls.
Technical view
The issue is multiple stack overflow vulnerabilities in scripts behind the web-based management interface. Cisco attributes the flaws to insufficient boundary restrictions on user-supplied input. Exploitation requires network access and high-privilege administrative authentication, but successful exploitation can impact confidentiality, integrity, and availability with root-level code execution.
Likely exposure
Exposure is limited to organizations running the named Cisco Small Business RV router families with the web-based management interface accessible to administrative users or compromised administrator accounts.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The attack is remote and low complexity after administrative authentication, making stolen or shared admin credentials the main practical risk amplifier.
Researcher notes
CVE data identifies CWE-119, CVSS 7.2, AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Evidence supports authenticated remote root-level impact through stack overflow, but the prompt bundle does not include exact fixed versions or proof of exploitation in the wild.
Mitigation direction
- Check Cisco's advisory for fixed firmware or official mitigation guidance.
- Inventory RV016, RV042, RV082, RV320, and RV325 devices.
- Limit web management access to trusted administrative networks.
- Review and tighten administrative account access on affected routers.
- Prioritize replacement if vendor-supported fixes are unavailable.
Validation and detection
- Confirm whether any named RV router models are deployed.
- Record current firmware versions for affected devices.
- Compare device versions against Cisco advisory guidance.
- Verify management interfaces are not broadly reachable.
- Review router logs for crashes or unexpected admin activity.
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-2020-3286 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.