Live › vulnerability › CVE-2017-12232
Go to dashboardA protocol implementation flaw in Cisco IOS on Integrated Services Routers Generation 2 lets an unauthenticated attacker on the adjacent network cause the device to reload. The result is a denial of service, and CISA lists it as known exploited.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco IOS software | vendor | – | – |
Unknown from the sources.
Apply the updates per Cisco's vendor instructions; the specific fixed IOS version is not stated in the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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