CVE-2017-12235
Actively exploited. CVE-2017-12235 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 the PROFINET Discovery and Configuration Protocol (PN-DCP) for 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 PROFINET Discovery and Configuration Protocol (PN-DCP) could allow an unauthenticated, remote attacker to cause a denial of service.
- Who is affected
- Unauthenticated remote attackers can exploit this vulnerability against Cisco IOS devices.
- Urgency
- Immediate remediation is necessary as the vulnerability is critical and actively exploited.
- Action
- Apply the security patches provided by 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-2017-12235: Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial-of-Service Vulnerabi…cisa-kev · 2022-03-03
External references
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