Security readout for executives and security teams
Plain-English summary
Cisco small-business RV routers have management-interface flaws that can let a logged-in administrator crash the router or run code as root. This is serious for branch or small office networks, but the source bundle describes administrative privileges as required; it is not presented as unauthenticated compromise.
Executive priority
Treat this as high priority where these routers protect offices, branches, or partner connectivity. Administrative credentials are required, but compromise of an admin account could turn this into full device control with network impact.
Technical view
CVE-2020-3289 covers multiple stack overflow vulnerabilities in scripts used by the web-based management interface. Insufficient boundary restrictions on supplied input can allow crafted oversized values to trigger denial of service or arbitrary code execution as root on affected Cisco Small Business RV routers.
Likely exposure
Organizations using Cisco RV320, RV325, RV016, RV042, or RV082 routers may be exposed if vulnerable firmware is present and the web management interface is reachable. The bundle does not identify exact vulnerable firmware versions, so validation against Cisco's advisory is required.
Exploitation context
The CVSS vector is network reachable, low complexity, no user interaction, and high privileges required. The bundle states successful exploitation can crash the device or execute arbitrary code with root privileges. KEV is false, and no provided source states active exploitation.
Researcher notes
The source bundle provides product families, impact, CVSS, CWE-119, and the vendor advisory, but not exact vulnerable or fixed firmware versions. Avoid assuming exploit availability or active exploitation without additional evidence.
Mitigation direction
- Review Cisco's advisory for affected firmware and fixed releases.
- Upgrade affected routers using Cisco-supported firmware where available.
- Restrict web management access to trusted administrative networks only.
- Disable unnecessary remote management exposure.
- Rotate and protect administrator credentials for affected devices.
Validation and detection
- Inventory Cisco RV320, RV325, RV016, RV042, and RV082 routers.
- Record firmware versions and compare them with Cisco's advisory.
- Confirm web management interfaces are not internet exposed.
- Review administrative account access and recent configuration changes.
- Check monitoring for unexpected reboots or management 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-2020-3289 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.