Security readout for executives and security teams
Plain-English summary
This is a denial-of-service issue in the SSH management service for Cisco IEC6400 Wireless Backhaul Edge Compute Software. A remote unauthenticated attacker could make SSH stop responding during an attack. The sources state other appliance operations remain stable, so the main business impact is temporary loss of remote administrative access.
Executive priority
Treat as a moderate operational resilience issue. Prioritize exposed remote-management interfaces, especially in environments where losing SSH access would delay incident response or maintenance. It is not described as data theft or system takeover.
Technical view
CVE-2026-20080 is a CWE-400 resource-consumption flaw caused by insufficient flood protection in the SSH service. Network access to the SSH port is enough to trigger the issue. CVSS 3.1 is 5.3: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. Affected versions listed are 1.0.0, 1.0.1, 1.0.2, and 1.1.0.
Likely exposure
Exposure is highest where SSH on affected Cisco Ultra-Reliable Wireless Backhaul / IEC6400 software is reachable from untrusted networks. Systems limited to protected management networks have lower exposure, but administrative access could still be disrupted by a reachable attacker.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked KEV. Exploitation does not require authentication or user interaction, but the documented impact is limited to SSH unresponsiveness during the DoS period while other operations remain stable.
Researcher notes
Evidence is limited to CVE metadata and Cisco’s advisory reference in the source bundle. No exploit details, public exploitation, or patch version is named in the provided data. The impact appears scoped to SSH availability, not appliance data confidentiality or integrity.
Mitigation direction
- Review the Cisco advisory for fixed software or official mitigation guidance.
- Inventory Cisco IEC6400 deployments and confirm running software versions.
- Restrict SSH management access to trusted administrative networks where feasible.
- Monitor SSH availability and management-plane traffic for flood-like patterns.
Validation and detection
- Check whether deployed versions match 1.0.0, 1.0.1, 1.0.2, or 1.1.0.
- Confirm whether SSH is reachable from untrusted or broad network segments.
- Verify Cisco advisory guidance against the installed software release.
- Review logs and monitoring for SSH service instability or excessive connection attempts.
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
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CWE-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-20080 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-iec6400-Pem5uQ7vCVE reference
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.