CVE-2017-12234
Actively exploited. CVE-2017-12234 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
There is a vulnerability in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service.
CSIRTS triage
- What
- A vulnerability in the implementation of the Common Industrial Protocol feature could allow an unauthenticated remote attacker to cause a denial of service.
- Who is affected
- Users of affected Cisco IOS devices.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Apply the latest updates from Cisco.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2017-12234: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
External references
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