Security readout for executives and security teams
Plain-English summary
CVE-2021-1415 affects Cisco RV340, RV340W, RV345, and RV345P VPN routers. An attacker with valid access to the web management interface could send a specially crafted request and run code on the router. Business risk is moderate because authentication is required, but exposed management interfaces increase urgency.
Executive priority
Treat as a moderate-priority infrastructure exposure. Authentication limits broad opportunistic risk, but compromise of a VPN router can affect network trust, availability, and traffic paths. Prioritize internet-reachable or broadly accessible management interfaces first.
Technical view
The issue is in the web-based management interface of affected Cisco RV34x routers. Improper HTTP request validation can let an authenticated remote attacker execute arbitrary code with privileges equivalent to the web service process. CVSS 3.1 is 6.3: network reachable, low complexity, low privileges required, no user interaction.
Likely exposure
Organizations using Cisco RV340, RV340W, RV345, or RV345P routers are exposed if the web management interface is reachable by users or networks where attacker credentials could be obtained. Exact affected firmware versions are not provided in the bundle.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires authenticated access to the router web management interface, so credential theft, weak admin access controls, or exposed management surfaces would materially raise risk.
Researcher notes
The provided data ties CVE-2021-1415 to improper HTTP request validation and CWE-502, but does not include exact affected firmware ranges or fixed versions. Avoid assuming exploitation in the wild. Validation should focus on model, firmware, management exposure, and authenticated access paths.
Mitigation direction
- Identify Cisco RV340, RV340W, RV345, and RV345P devices in inventory.
- Check Cisco’s advisory for fixed software and supported remediation details.
- Restrict web management access to trusted administrative networks only.
- Review admin accounts and remove unnecessary router management access.
- Monitor Cisco guidance if exact affected firmware status is unclear.
Validation and detection
- Confirm router model and firmware against Cisco’s advisory.
- Verify the web management interface is not internet-exposed.
- Review logs for unusual authenticated management activity.
- Check who has administrative access to affected routers.
- Document any devices where firmware status cannot be confirmed.
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-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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-2021-1415 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
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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:L/UI:N/S:U/C:L/I:L/A:L2.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20210407 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Authenticated Remote Code Execution VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
- https://www.zerodayinitiative.com/advisories/ZDI-21-560/CVE reference · x_refsource_MISC
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.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.