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HIGH SEVERITY
CVE-2020-3118 Cisco · IOS XR

Cisco IOS XR Software Discovery Protocol Format String Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH
8.8 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Likelihood

EPSS Prediction

0.29 %
Predictive Probability
Percentile Rank
52.3 th

Documented as more likely to be exploited than 52.3% of known CVEs.

Detection Date

Nov 03, 2021

Remediation Due

May 03, 2022

CISA Catalog Active

Threat Analysis

Cisco IOS XR improperly validates string input from certain fields in Cisco Discovery Protocol messages. Exploitation could allow an unauthenticated, adjacent attacker to execute code with administrative privileges or cause a reload on an affected device.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence