Security readout for executives and security teams
Plain-English summary
This flaw affects several Cisco Small Business RV routers. If an attacker already has valid administrator credentials, they could abuse the web management interface to run code as root or force the router to restart, disrupting connectivity.
Executive priority
Treat this as high priority for branch, small office, and edge networks using the listed Cisco RV routers. The attacker needs admin credentials, but successful compromise could affect confidentiality, integrity, and availability of network traffic.
Technical view
CVE-2021-1341 is an authenticated remote command execution and denial-of-service issue in the web-based management interface of Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 routers. Cisco attributes it to improper validation of user input. CVSS is 7.2 high.
Likely exposure
Exposure is most likely where affected Cisco Small Business RV routers are still deployed and their web management interface is reachable. Risk increases if administrator credentials are shared, stale, reused, or compromised.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires valid administrator credentials and crafted HTTP requests to the management interface. Successful exploitation may provide root-level code execution or cause router reloads.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory metadata in the supplied bundle. Do not assume unauthenticated exploitation, internet-scale exploitation, or a specific fixed version from these sources alone.
Mitigation direction
- Review Cisco advisory and apply vendor-provided fixed software or replacement guidance.
- Restrict web management access to trusted administrative networks only.
- Remove unnecessary admin accounts and rotate privileged credentials.
- Monitor affected routers for unexpected reloads and authenticated management anomalies.
- Plan compensating controls or replacement if Cisco provides no fixed software.
Validation and detection
- Inventory Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 devices.
- Confirm firmware status against Cisco advisory guidance.
- Verify management interfaces are not exposed outside approved administration paths.
- Review administrator accounts for shared, stale, or compromised credentials.
- Check device logs for unexpected reloads or suspicious authenticated 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-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-2021-1341 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210203 Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service 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.