Security readout for executives and security teams
Plain-English summary
Cisco reported critical flaws in the web management interface of RV340, RV340W, RV345, and RV345P VPN routers. A remote unauthenticated attacker could potentially take control, run commands, or disrupt the device. These routers often sit at network edges, so exposed management interfaces deserve urgent attention.
Executive priority
Treat as urgent for any affected edge router. Prioritize internet-facing or broadly reachable management interfaces first, then complete firmware validation and remediation across remaining RV Series assets.
Technical view
CVE-2021-1610 covers multiple web management vulnerabilities in Cisco Small Business RV Series router firmware. The CVSS 3.1 score is 9.8 with network access, low complexity, no privileges, and no user interaction. The source maps the issue to CWE-121 and cites possible arbitrary code execution, command execution, and denial of service.
Likely exposure
Exposure is most likely where affected Cisco RV340, RV340W, RV345, or RV345P routers have reachable web-based management. The bundle does not provide exact vulnerable firmware ranges, so teams must confirm device models and firmware against Cisco’s advisory.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Risk remains high because the CVSS vector is unauthenticated, network reachable, and impacts confidentiality, integrity, and availability.
Researcher notes
Evidence is strong for severity and affected models, but incomplete for exact vulnerable versions and fixed firmware in the provided bundle. Avoid assuming exploit activity; KEV is false in the supplied data.
Mitigation direction
- Inventory Cisco RV340, RV340W, RV345, and RV345P routers.
- Check Cisco’s advisory for affected firmware and fixed releases.
- Update affected devices according to Cisco guidance.
- Restrict web management access to trusted administrative networks.
- Disable unnecessary remote management exposure where operationally feasible.
Validation and detection
- Confirm router model and firmware version from asset records.
- Compare installed firmware with Cisco advisory guidance.
- Identify whether web management is reachable from untrusted networks.
- Review administrative access controls for management interfaces.
- Monitor devices for crashes, unexpected configuration changes, or suspicious 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-121: 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-2021-1610 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210804 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Web Management 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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.