Buffer overflow in Cisco Small Business Rv Series Router Firmware
CVE-2024-20521
A vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, Administrator-level, remote attacker to execute arbitrary code as the root user. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device. This vulnerability is due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.
Vulnerability class: Buffer Overflow
EPSS: 0.007 (47.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Cisco Small Business Rv Series Router Firmware — versions 4.0.2.08-tm, 4.2.3.08, 4.1.1.01
- Cisco Rv042
- Cisco Rv042_firmware — versions 1.0.1.17, 1.0.2.03, 1.1.0.09
- Cisco Rv042g
- Cisco Rv042g_firmware — versions 1.0.1.17, 1.0.2.03, 1.1.0.09
- Cisco Rv320
- Cisco Rv320_firmware — versions 1.0.1.17, 1.0.2.03, 1.1.0.09
- Cisco Rv325
- Cisco Rv325_firmware — versions 1.0.1.17, 1.0.2.03, 1.1.0.09
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20521?
- CVE-2024-20521 is a medium-severity vulnerability in Cisco Small Business Rv Series Router Firmware, classified under Stack-based Buffer Overflow. CVSS score: 6.5/10. Published 2024-10-02.
- How severe is CVE-2024-20521?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2024-20521 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.