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CVE-2020-3161: Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

criticalknown exploitedpublic exploitCVE-2020-3161
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Cisco IP Phones contain an improper input validation vulnerability for HTTP requests. Exploitation could allow an attacker to execute code remotely with root privileges or cause a denial-of-service (DoS) condition.

CSIRTS triage

vendor: Ciscoproduct: IP PhonesRemote code executionDenial of service
What
An improper input validation vulnerability could allow remote code execution or denial-of-service conditions.
Who is affected
Deployments of Cisco IP Phones are affected.
Urgency
Remediation is urgent as the vulnerability is actively exploited and critical.
Action
Update to the latest firmware for Cisco IP Phones.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-3161

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-3161coverage & exploitation statusNVD · CVE.org

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