THREATPORT/VULNERABILITY/CVE-2020-3258
CRITICAL SEVERITY

CVE-2020-3258

Ios vulnerability

CVSS
9.8
EPSS
4.6%
EPSS pct
91th
Exploited
No known
Multiple vulnerabilities in Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker or an authenticated, local attacker to execute arbitrary code on an affected system or cause an affected system to crash and reload. For more information about these vulnerabilities, see the Details section of this advisory.
Affected vendor
Cisco
Affected product
Ios
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2020-06-03

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2020-3258

  • Confirm whether Cisco Ios is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-3258.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-3258

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-3258 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2020-3258?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2020-3258.

Start free scan

No credit card. Agentless.

Related vulnerabilities

CRITICAL
CVE-2026-20079
CVE-2026-20079 vulnerability
CRITICAL
CVE-2026-29000
CVE-2026-29000 vulnerability
CRITICAL
CVE-2026-27944
Nginx Ui vulnerability