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Cisco IOS XR Software Security Hardening Release: September 2026

CVSS 3.1 8.8 HIGHCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-20278

Published

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-2026-20278 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) CWE-707.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-20278

Published

Cisco IOS XR Software

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco IOS XR Software",
                    "versions": [
                        {
                            "version": "6.5.29",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.26",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.25",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.28",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.90",
                            "status": "affected"
                        },
                        {
                            "version": "7.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.90",
                            "status": "affected"
                        },
                        {
                            "version": "6.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.1.15",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "6.7.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.11",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.12",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.14",
                            "status": "affected"
                        },
                        {
                            "version": "7.1.25",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.12",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.1.3",
                            "status": "affected"
                        },
                        {
                            "version": "6.7.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "6.7.4",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.31",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.15",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.16",
                            "status": "affected"
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                        {
                            "version": "6.8.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.15",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.32",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.16",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.27",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.8.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.15",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.12",
                            "status": "affected"
                        },
                        {
                            "version": "7.8.12",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "6.8.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.4",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "6.7.35",
                            "status": "affected"
                        },
                        {
                            "version": "6.9.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.2",
                            "status": "affected"
                        },
                        {
                            "version": "6.9.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.9.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.10.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.8.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.4",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.33",
                            "status": "affected"
                        },
                        {
                            "version": "7.8.22",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.21",
                            "status": "affected"
                        },
                        {
                            "version": "7.9.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.5",
                            "status": "affected"
                        },
                        {
                            "version": "7.11.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.9.21",
                            "status": "affected"
                        },
                        {
                            "version": "7.10.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.1.1",
                            "status": "affected"
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                        {
                            "version": "7.6.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.6",
                            "status": "affected"
                        },
                        {
                            "version": "7.5.52",
                            "status": "affected"
                        },
                        {
                            "version": "7.11.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "24.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.2.11",
                            "status": "affected"
                        },
                        {
                            "version": "24.3.1",
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                        },
                        {
                            "version": "24.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "24.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.8.23",
                            "status": "affected"
                        },
                        {
                            "version": "7.11.21",
                            "status": "affected"
                        },
                        {
                            "version": "24.2.20",
                            "status": "affected"
                        },
                        {
                            "version": "24.3.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.4.10",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.35",
                            "status": "affected"
                        },
                        {
                            "version": "25.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "24.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.3.20",
                            "status": "affected"
                        },
                        {
                            "version": "24.4.15",
                            "status": "affected"
                        },
                        {
                            "version": "25.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.351",
                            "status": "affected"
                        },
                        {
                            "version": "25.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "24.3.30",
                            "status": "affected"
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                        {
                            "version": "25.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.352",
                            "status": "affected"
                        },
                        {
                            "version": "24.4.30",
                            "status": "affected"
                        },
                        {
                            "version": "24.2.21",
                            "status": "affected"
                        },
                        {
                            "version": "25.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "25.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "25.2.15",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "25.2.30",
                            "status": "affected"
                        },
                        {
                            "version": "6.5.353",
                            "status": "affected"
                        },
                        {
                            "version": "26.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "25.1.30",
                            "status": "affected"
                        },
                        {
                            "version": "25.3.15",
                            "status": "affected"
                        },
                        {
                            "version": "26.2.100",
                            "status": "affected"
                        },
                        {
                            "version": "25.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "26.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "25.4.30",
                            "status": "affected"
                        },
                        {
                            "version": "26.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "25.4.201",
                            "status": "affected"
                        },
                        {
                            "version": "26.2.101",
                            "status": "affected"
                        },
                        {
                            "version": "25.2.21",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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