Security readout for executives and security teams
Plain-English summary
This is a critical Cisco small business router flaw. An unauthenticated internet attacker could potentially take full control of affected RV160 and RV260-series VPN routers through the web management interface, running code as root. Treat exposed management interfaces as urgent because compromise could affect network edge control.
Executive priority
Prioritize remediation for any exposed affected routers. This is a network-edge, unauthenticated root-code-execution risk with potential business impact across remote access, perimeter routing, and downstream network trust.
Technical view
CVE-2021-1295 covers multiple remote code execution vulnerabilities in the web-based management interface of Cisco RV160, RV160W, RV260, RV260P, and RV260W VPN routers. Cisco attributes the issue to improper HTTP request validation. Successful exploitation allows arbitrary code execution as root. CVSS v3.1 is 9.8.
Likely exposure
Exposure is most likely where affected Cisco Small Business RV160/RV260-series VPN routers are deployed and their web-based management interface is reachable from untrusted networks. The bundle does not provide affected firmware version ranges.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The vulnerability is remotely reachable, requires no authentication, and has low attack complexity, which makes exposed devices high priority even without confirmed exploitation.
Researcher notes
Evidence is strongest for impact, affected product families, attack vector, and CVSS from CVE/Cisco sources. The supplied bundle does not include firmware version ranges, fixed-release details, public exploit evidence, or KEV status beyond kev=false.
Mitigation direction
- Identify Cisco RV160/RV260-series routers in the environment.
- Review Cisco's advisory for fixed firmware and supported mitigation guidance.
- Restrict web management access to trusted administrative networks only.
- Disable unnecessary remote management exposure where operationally possible.
- Replace unsupported or unpatchable devices through normal lifecycle controls.
Validation and detection
- Inventory edge devices for RV160, RV160W, RV260, RV260P, and RV260W models.
- Compare installed firmware against Cisco advisory guidance.
- Confirm management interfaces are not internet-accessible unless explicitly required.
- Review firewall rules controlling administrative access to router management.
- Check device logs for suspicious management-interface 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-472: 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-2021-1295 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
- 20210203 Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote 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.
External Control of Assumed-Immutable Web Parameter
External Control of Assumed-Immutable Web Parameter represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.