What is the CVSS score of CVE-2021-1473?

CVE-2021-1473 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 64.2%.

Is there a public PoC exploit available for CVE-2021-1473?

Yes, a public proof-of-concept exploit is available for CVE-2021-1473. Prioritise patching immediately. EPSS: 64.2%.

Rv340 Firmware CVE-2021-1473

CRITICAL

Buffer Overflow (CWE-119)

2021-04-08 psirt@cisco.com

Buffer Overflow Cisco Rv340 Firmware Rv340W Firmware Rv345 Firmware Rv345P Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 08, 2021 - 04:15 nvd

CRITICAL 9.8

DescriptionNVD

Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers. A remote attacker could execute arbitrary commands or bypass authentication and upload files on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

AnalysisAI

Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers. A remote attacker could execute arbitrary commands or bypass authentication and upload files on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Affected products include: Cisco Rv340 Firmware, Cisco Rv340W Firmware, Cisco Rv345 Firmware, Cisco Rv345P Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.