CVE-2017-12232
Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability
Published Sep 28, 2017 · updated Jun 16, 2026 · cisco ios
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvc03809.
Timeline
Detection, updates, and resolution for this record.
Sep 28, 2017 · Catalog
Detected
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnera
Mar 3, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Mar 24, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnera
Required action
Apply updates per vendor instructions.
CISA due date Mar 24, 2022
Affected
- cpe cisco/iosversion unspecified
- vendor Cisco IOS softwareversion unspecified
Sources
- CISA KEVCVE-2017-12232
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service.
cisa.gov - CVE.orgCVE-2017-12232
Official CVE identifier
cve.org - FIRST EPSSCVE-2017-12232
30-day exploitation probability 2.2%
first.org - NIST NVDCVE-2017-12232
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (Do
nvd.nist.gov