Security readout for executives and security teams
Plain-English summary
This vulnerability lets a logged-in remote attacker run commands as root through the web management interface of certain Cisco Small Business RV routers. Because CISA lists it as known exploited, exposed or poorly controlled management interfaces should be treated as urgent business risk.
Executive priority
Prioritize immediate identification and containment of internet-reachable affected routers, then follow Cisco remediation guidance. KEV listing means this is not theoretical, even though the vulnerability requires credentials or a session token.
Technical view
Cisco describes insufficient input validation in the HTTP payload of the web-based management interface. An attacker needs valid credentials or an active session token, but successful exploitation allows arbitrary command execution with root privileges on RV016, RV042, RV042G, and RV082 routers.
Likely exposure
Exposure is most likely where affected Cisco Small Business RV routers have web management reachable from untrusted networks, shared credentials, weak administrative controls, or vulnerable firmware still deployed in branch or small-office environments.
Exploitation context
CISA KEV status supports known exploitation. The source bundle does not provide exploit timing, actor attribution, exploit code status, or whether exploitation is widespread. Authentication or a valid session token is required.
Researcher notes
The record cites CVSS 8.8 and CWE-502, while the description emphasizes HTTP payload input validation. Do not assume unauthenticated access. Evidence provided does not include fixed versions, exploit mechanics, or specific indicators of compromise.
Mitigation direction
- Inventory Cisco RV016, RV042, RV042G, and RV082 routers.
- Check Cisco’s advisory for fixed firmware or vendor-directed remediation.
- Remove public access to the web management interface.
- Restrict administration to trusted management networks or VPN access.
- Review administrative accounts and rotate exposed credentials.
- Replace unsupported devices if vendor remediation is unavailable.
Validation and detection
- Confirm router models and firmware versions against Cisco’s advisory.
- Check whether web management is reachable from the internet.
- Review logs for unusual authenticated management activity.
- Verify administrative access is limited to approved networks.
- Confirm remediation through configuration review, not exploit testing.
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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-15271 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
- 8.8 (3.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/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.
CISA KEV status
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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20191106 Cisco Small Business RV016, RV042, RV042G, and RV082 Routers Arbitrary Command Execution VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-15271CVE reference · government-resource
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.