CVE-2026-20274

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 0.73%
EPSS Percentile: 53.02%
CISA KEV: Not listed

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 03-Sep-2026 00:17
Last Modified: 18-Sep-2026 01:03
EPSS Date: 2026-10-12
CWE: CWE-664

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

cisco / ios_xr
Version / affected range: 6.5.25
cpe:2.3:o:cisco:ios_xr:6.5.25:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.26
cpe:2.3:o:cisco:ios_xr:6.5.26:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.28
cpe:2.3:o:cisco:ios_xr:6.5.28:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.29
cpe:2.3:o:cisco:ios_xr:6.5.29:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.31
cpe:2.3:o:cisco:ios_xr:6.5.31:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.32
cpe:2.3:o:cisco:ios_xr:6.5.32:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.33
cpe:2.3:o:cisco:ios_xr:6.5.33:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.35
cpe:2.3:o:cisco:ios_xr:6.5.35:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.90
cpe:2.3:o:cisco:ios_xr:6.5.90:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.351
cpe:2.3:o:cisco:ios_xr:6.5.351:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.352
cpe:2.3:o:cisco:ios_xr:6.5.352:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.5.353
cpe:2.3:o:cisco:ios_xr:6.5.353:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.7.1
cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.7.2
cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.7.3
cpe:2.3:o:cisco:ios_xr:6.7.3:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.7.4
cpe:2.3:o:cisco:ios_xr:6.7.4:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.7.35
cpe:2.3:o:cisco:ios_xr:6.7.35:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.8.1
cpe:2.3:o:cisco:ios_xr:6.8.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.8.2
cpe:2.3:o:cisco:ios_xr:6.8.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.9.1
cpe:2.3:o:cisco:ios_xr:6.9.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 6.9.2
cpe:2.3:o:cisco:ios_xr:6.9.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.0
cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.1
cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.2
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.11
cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.12
cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.14
cpe:2.3:o:cisco:ios_xr:7.0.14:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.0.90
cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.1.1
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.1.2
cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.1.3
cpe:2.3:o:cisco:ios_xr:7.1.3:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.1.15
cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.1.25
cpe:2.3:o:cisco:ios_xr:7.1.25:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.2.0
cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.2.1
cpe:2.3:o:cisco:ios_xr:7.2.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.2.2
cpe:2.3:o:cisco:ios_xr:7.2.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.2.12
cpe:2.3:o:cisco:ios_xr:7.2.12:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.1
cpe:2.3:o:cisco:ios_xr:7.3.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.2
cpe:2.3:o:cisco:ios_xr:7.3.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.3
cpe:2.3:o:cisco:ios_xr:7.3.3:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.4
cpe:2.3:o:cisco:ios_xr:7.3.4:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.5
cpe:2.3:o:cisco:ios_xr:7.3.5:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.6
cpe:2.3:o:cisco:ios_xr:7.3.6:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.15
cpe:2.3:o:cisco:ios_xr:7.3.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.16
cpe:2.3:o:cisco:ios_xr:7.3.16:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.3.27
cpe:2.3:o:cisco:ios_xr:7.3.27:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.4.1
cpe:2.3:o:cisco:ios_xr:7.4.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.4.2
cpe:2.3:o:cisco:ios_xr:7.4.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.4.15
cpe:2.3:o:cisco:ios_xr:7.4.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.4.16
cpe:2.3:o:cisco:ios_xr:7.4.16:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.1
cpe:2.3:o:cisco:ios_xr:7.5.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.2
cpe:2.3:o:cisco:ios_xr:7.5.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.3
cpe:2.3:o:cisco:ios_xr:7.5.3:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.4
cpe:2.3:o:cisco:ios_xr:7.5.4:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.5
cpe:2.3:o:cisco:ios_xr:7.5.5:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.12
cpe:2.3:o:cisco:ios_xr:7.5.12:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.5.52
cpe:2.3:o:cisco:ios_xr:7.5.52:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.6.1
cpe:2.3:o:cisco:ios_xr:7.6.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.6.2
cpe:2.3:o:cisco:ios_xr:7.6.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.6.3
cpe:2.3:o:cisco:ios_xr:7.6.3:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.6.15
cpe:2.3:o:cisco:ios_xr:7.6.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.7.1
cpe:2.3:o:cisco:ios_xr:7.7.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.7.2
cpe:2.3:o:cisco:ios_xr:7.7.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.7.21
cpe:2.3:o:cisco:ios_xr:7.7.21:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.8.1
cpe:2.3:o:cisco:ios_xr:7.8.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.8.2
cpe:2.3:o:cisco:ios_xr:7.8.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.8.12
cpe:2.3:o:cisco:ios_xr:7.8.12:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.8.22
cpe:2.3:o:cisco:ios_xr:7.8.22:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.8.23
cpe:2.3:o:cisco:ios_xr:7.8.23:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.9.1
cpe:2.3:o:cisco:ios_xr:7.9.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.9.2
cpe:2.3:o:cisco:ios_xr:7.9.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.9.21
cpe:2.3:o:cisco:ios_xr:7.9.21:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.10.1
cpe:2.3:o:cisco:ios_xr:7.10.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.10.2
cpe:2.3:o:cisco:ios_xr:7.10.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.11.1
cpe:2.3:o:cisco:ios_xr:7.11.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.11.2
cpe:2.3:o:cisco:ios_xr:7.11.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 7.11.21
cpe:2.3:o:cisco:ios_xr:7.11.21:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.1.1
cpe:2.3:o:cisco:ios_xr:24.1.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.1.2
cpe:2.3:o:cisco:ios_xr:24.1.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.2.1
cpe:2.3:o:cisco:ios_xr:24.2.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.2.2
cpe:2.3:o:cisco:ios_xr:24.2.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.2.11
cpe:2.3:o:cisco:ios_xr:24.2.11:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.2.20
cpe:2.3:o:cisco:ios_xr:24.2.20:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.2.21
cpe:2.3:o:cisco:ios_xr:24.2.21:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.3.1
cpe:2.3:o:cisco:ios_xr:24.3.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.3.2
cpe:2.3:o:cisco:ios_xr:24.3.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.3.20
cpe:2.3:o:cisco:ios_xr:24.3.20:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.3.30
cpe:2.3:o:cisco:ios_xr:24.3.30:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.4.1
cpe:2.3:o:cisco:ios_xr:24.4.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.4.2
cpe:2.3:o:cisco:ios_xr:24.4.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.4.10
cpe:2.3:o:cisco:ios_xr:24.4.10:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.4.15
cpe:2.3:o:cisco:ios_xr:24.4.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 24.4.30
cpe:2.3:o:cisco:ios_xr:24.4.30:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.1.1
cpe:2.3:o:cisco:ios_xr:25.1.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.1.2
cpe:2.3:o:cisco:ios_xr:25.1.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.1.30
cpe:2.3:o:cisco:ios_xr:25.1.30:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.2.1
cpe:2.3:o:cisco:ios_xr:25.2.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.2.2
cpe:2.3:o:cisco:ios_xr:25.2.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.2.15
cpe:2.3:o:cisco:ios_xr:25.2.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.2.30
cpe:2.3:o:cisco:ios_xr:25.2.30:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.3.1
cpe:2.3:o:cisco:ios_xr:25.3.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.3.15
cpe:2.3:o:cisco:ios_xr:25.3.15:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.4.1
cpe:2.3:o:cisco:ios_xr:25.4.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.4.2
cpe:2.3:o:cisco:ios_xr:25.4.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.4.30
cpe:2.3:o:cisco:ios_xr:25.4.30:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 25.4.201
cpe:2.3:o:cisco:ios_xr:25.4.201:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 26.1.1
cpe:2.3:o:cisco:ios_xr:26.1.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 26.1.2
cpe:2.3:o:cisco:ios_xr:26.1.2:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 26.2.1
cpe:2.3:o:cisco:ios_xr:26.2.1:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 26.2.100
cpe:2.3:o:cisco:ios_xr:26.2.100:*:*:*:*:*:*:*
cisco / ios_xr
Version / affected range: 26.2.101
cpe:2.3:o:cisco:ios_xr:26.2.101:*:*:*:*:*:*:*

References

Last enrichment sync: 24-Oct-2026 05:25
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

CVE-2026-20274, which covers memory-safety and resource-lifetime bugs, and CVE-2026-20279, which covers access-control bugs including missing authentication for critical functions and improper certificate validation, Cisco Patches Critical Nexus 9000 Flaw Enabling Unauthenticated Remote Code Execution
Audit and patch (or virtually patch via IPS) all internet-facing Fortinet, Cisco, and VMware infrastructure — particularly CVE-2020-12812 and CVE-2026-20274 Q1 2026 Threat Review Details Risks Facing U.S. Public Sector

CVE (12)

People (1)

Threat Actors (3)

MITRE ATT&CK (5)

Vendors (7)

Products (14)

Tools (1)

Industries (5)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.