Security readout for executives and security teams
Plain-English summary
This CVE 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 business risk is highest where these legacy routers remain in service and management access is reachable beyond tightly trusted administrators.
Executive priority
Treat as high priority for environments still using these Cisco small business routers, especially if remote management is exposed. The attacker needs admin access, but successful exploitation could give root-level control or disrupt connectivity.
Technical view
Cisco describes stack overflow vulnerabilities in scripts used by the web-based management interface for RV320, RV325, RV016, RV042, and RV082 routers. Insufficient boundary restrictions on user input allow crafted requests with oversized values. Successful exploitation requires authenticated administrative privileges and may cause denial of service or arbitrary code execution as root.
Likely exposure
Exposure is limited to affected Cisco Small Business RV router models where an attacker can authenticate as an administrator to the web management interface. Internet-reachable or broadly accessible management planes increase practical risk.
Exploitation context
The source bundle does not identify active exploitation, and this CVE is not marked KEV. Exploitation is remote over the management interface but requires high privileges: administrative login access before sending malicious oversized input.
Researcher notes
The key constraint is privilege: PR:H in CVSS and Cisco’s description require administrative web-interface access. The source bundle does not provide exact affected firmware versions, exploit-in-the-wild evidence, or precise remediation version numbers, so validation should be tied directly to Cisco’s advisory.
Mitigation direction
- Inventory RV320, RV325, RV016, RV042, and RV082 routers.
- Review Cisco’s advisory for affected releases and fixed software guidance.
- Apply vendor-provided firmware updates or replacements where applicable.
- Restrict web management access to trusted administrative networks only.
- Disable unnecessary remote management exposure where operationally feasible.
Validation and detection
- Confirm whether listed Cisco RV models exist in the environment.
- Check firmware status against Cisco’s advisory.
- Verify management interfaces are not exposed to untrusted networks.
- Review administrative account access and remove unnecessary privileges.
- Monitor affected routers for crashes or unexpected configuration changes.
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
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CWE-119: Exact CWE lookup
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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-2020-3287 mapping review
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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.