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TI-2021-01067 Aliases CVE-2021-1340GHSA-8ww2-j39p-q769

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

Priority LOW 39CWE-121Published · Updated

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

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02873 86th 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

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Small Business RV Series Router Firmwareall versions—No fix listedCNA
  • Cisco Small Business RV Series Router Firmware VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:cisco:rv016_multi-wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 4.2.3.14VulnerableCisco
cpe:2.3:h:cisco:rv016_multi-wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:rv042_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 4.2.3.14VulnerableCisco
cpe:2.3:h:cisco:rv042_dual_wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:rv042g_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 4.2.3.14VulnerableCisco
cpe:2.3:h:cisco:rv042g_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:rv082_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 4.2.3.14VulnerableCisco
cpe:2.3:h:cisco:rv082_dual_wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:rv320_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 1.5.1.11VulnerableCisco
cpe:2.3:h:cisco:rv320_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:rv016_multi-wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 4.2.3.14 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv016_multi-wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:rv042_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 4.2.3.14 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv042_dual_wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:rv042g_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 4.2.3.14 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv042g_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:rv082_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 4.2.3.14 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv082_dual_wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:rv320_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 1.5.1.11 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv320_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:rv325_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:*up to 1.5.1.11VulnerableCisco
cpe:2.3:h:cisco:rv325_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:rv325_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* Versions up to 1.5.1.11 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:rv325_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Cisco Small Business RV Series Router Firmware — 20210203 Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities

    30 records Highest priority Priority LOW 30 LOW

    Other records, highest priority first

    • TI-2021-01075 Stack-based buffer overflow in Cisco Small Business RV Series Router FirmwarePriority LOW 39
    • TI-2021-01074 Stack-based buffer overflow in Cisco Small Business RV Series Router FirmwarePriority LOW 39
    • TI-2021-01073 Stack-based buffer overflow in Cisco Small Business RV Series Router FirmwarePriority LOW 39
    Show all 30 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1340
  2. 2026-10-03 Alias added: GHSA-8ww2-j39p-q769

References

Advisory 1

  • TI-2021-01075 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
  • TI-2021-01074 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
  • TI-2021-01073 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
  • TI-2021-01069 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
  • TI-2021-01068 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
  • TI-2021-01066 Stack-based buffer overflow in Cisco Small Business RV Series Router Firmware CVSS 3.1HIGH 7.2
See all 34 →

Sources

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