CVE-2017-12232
Actively exploited. CVE-2017-12232 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.
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.
CSIRTS triage
- What
- A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers could allow an unauthenticated attacker to cause a denial of service.
- Who is affected
- Users of Cisco Integrated Services Routers Generation 2 (ISR G2) running Cisco IOS.
- Urgency
- Urgent remediation is necessary due to active exploitation and critical severity.
- Action
- Update Cisco IOS to the latest version.
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 80% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2017-12232: Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
External references
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