Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated remote actor crash and reload an affected Cisco 4461 router, interrupting network availability. The sources describe denial of service only, not data theft or control of the router. Business urgency depends on whether Cisco 4461 ISR devices running the affected IOS XE release carry critical traffic.
Executive priority
Treat this as a high-priority availability risk for affected network infrastructure, especially where a Cisco 4461 router supports branch, WAN, or customer-facing connectivity. It is less about breach of data and more about avoidable outage exposure.
Technical view
CVE-2020-3414 is an IPv4/IPv6 packet-processing flaw in Cisco IOS XE Software for Cisco 4461 Integrated Services Routers. Traffic sent to or through an affected device can trigger a reload. The CVSS 3.0 score is 8.6 because exploitation is remote, low-complexity, unauthenticated, and impacts availability.
Likely exposure
Exposure appears limited to Cisco 4461 Integrated Services Routers running the affected Cisco IOS XE Software release identified in the bundle. Organizations using these routers at WAN edges, branch sites, or routing chokepoints may face outage risk if reachable by untrusted traffic paths.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. They do support unauthenticated remote denial-of-service potential via IP traffic to or through an affected device. No exploit code, public weaponization details, or attacker campaign evidence is included in the bundle.
Researcher notes
The evidence identifies the affected platform, impact, attack prerequisites, CVSS vector, and vendor advisory. The bundle does not include specific fixed versions or workarounds, so remediation direction should be anchored to Cisco's advisory and device-specific validation.
Mitigation direction
- Inventory Cisco 4461 ISR devices and record exact IOS XE versions.
- Review Cisco's advisory for fixed releases, workarounds, and upgrade guidance.
- Prioritize remediation for routers carrying critical or externally reachable traffic.
- Apply existing network controls to reduce unnecessary untrusted traffic paths.
- Monitor affected routers for unexpected reloads until remediation is complete.
Validation and detection
- Confirm whether any Cisco 4461 ISR runs Cisco IOS XE Software 17.1.1.
- Check vendor advisory applicability against each device model and software train.
- Review device logs for unexplained reloads or availability interruptions.
- Validate that routing paths do not unnecessarily expose affected devices.
- After remediation, confirm the installed version matches Cisco guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-19: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-3414 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200924 Cisco IOS XE Software for Cisco 4461 Integrated Services Routers Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Data Processing Errors
Data Processing Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.