CVE-2021-1320
Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities
No known exploitation. EPSS puts it in the 82nd percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
- Cisco Rv016 Multi-wan Vpn Router FirmwareAffected: ≤ 4.2.3.14Upgrade to: after 4.2.3.14Stated by: NVD
- Cisco Rv042 Dual Wan Vpn Router FirmwareAffected: ≤ 4.2.3.14Upgrade to: after 4.2.3.14Stated by: NVD
- Cisco Rv042g Dual Gigabit Wan Vpn Router FirmwareAffected: ≤ 4.2.3.14Upgrade to: after 4.2.3.14Stated by: NVD
- Cisco Rv082 Dual Wan Vpn Router FirmwareAffected: ≤ 4.2.3.14Upgrade to: after 4.2.3.14Stated by: NVD
- Cisco Rv320 Dual Gigabit Wan Vpn Router FirmwareAffected: ≤ 1.5.1.11Upgrade to: after 1.5.1.11Stated by: NVD
Versions as the sources state them. 7 more products have version data. Full version matrix after sign-in
What it is
From the CVE record
Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
2.2% chance of exploitation activity in the next 30 days, which ranks it in the 82nd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 1967 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Cisco Small Business RV016Networking Infrastructure
- Cisco Small Business RV042Networking Infrastructure
- Cisco Small Business RV042GNetworking Infrastructure
- Cisco Small Business RV082Networking Infrastructure
- Cisco Small Business RV320Networking Infrastructure
- Cisco Small Business RV325Networking Infrastructure
- Cisco Small Business RV Series Router FirmwareNetworking Infrastructure
- rv016 multi-wan vpn router firmwareNetworking Infrastructure
And 5 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Scored 7.2 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
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