TI-2021-01014 Aliases CVE-2021-1287 GHSA-rh36-49q6-fm2j

Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware

LOW 38CWE-121Published 2021-03-18 · Updated 2024-11-08

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

A vulnerability in the web-based management interface of Cisco RV132W ADSL2+ Wireless-N VPN Routers and Cisco RV134W VDSL2 Wireless-AC VPN Routers could allow an authenticated, remote attacker to execute arbitrary code on an affected device or cause the device to restart unexpectedly. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. 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 as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition on the affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.02278 83rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Small Business RV Series Router Firmware	all versions	—	No fix listed	CNA

Cisco Small Business RV Series Router Firmware VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:rv132w_firmware::::::::	before 1.0.1.15	Vulnerable	Cisco
cpe:2.3:h:cisco:rv132w:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:rv134w_firmware::::::::	before 1.0.1.21	Vulnerable	Cisco
cpe:2.3:h:cisco:rv134w:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:rv132w_firmware:*:*:*:*:*:*:*:* Versions before 1.0.1.15 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv132w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:rv134w_firmware:*:*:*:*:*:*:*:* Versions before 1.0.1.21 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv134w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1287
2026-10-03 Alias added: GHSA-rh36-49q6-fm2j

References

Advisory 1

20210317 Cisco Small Business RV132W and RV134W Routers Management Interface Remote Command Execution and Denial of Service Vulnerability

TI-2018-00100 Improper input validation in Cisco RV132W and RV134W KEVCVSS 3.1CRITICAL 9.8
TI-2018-00101 Information disclosure in Cisco RV132W and RV134W Wireless VPN Routers CVSS 3.1CRITICAL 9.8
TI-2021-01036 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities CVSS 3.1HIGH 8.8
TI-2021-01035 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities CVSS 3.1HIGH 7.4
TI-2021-00978 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities CVSS 3.1HIGH 7.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences