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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-20276

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-2026-20276 are related to insufficient control flow management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-691.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 19.0%
CVSS Severity
CVSS v3 Score 8.6
Products affected by CVE-2026-20276
  • Cisco » Ios Xr » Version: 24.2.11
    cpe:2.3:o:cisco:ios_xr:24.2.11
  • Cisco » Ios Xr » Version: 24.2.20
    cpe:2.3:o:cisco:ios_xr:24.2.20
  • Cisco » Ios Xr » Version: 24.2.21
    cpe:2.3:o:cisco:ios_xr:24.2.21
  • Cisco » Ios Xr » Version: 24.3.20
    cpe:2.3:o:cisco:ios_xr:24.3.20
  • Cisco » Ios Xr » Version: 24.4.1
    cpe:2.3:o:cisco:ios_xr:24.4.1
  • Cisco » Ios Xr » Version: 24.4.10
    cpe:2.3:o:cisco:ios_xr:24.4.10
  • Cisco » Ios Xr » Version: 24.4.2
    cpe:2.3:o:cisco:ios_xr:24.4.2
  • Cisco » Ios Xr » Version: 24.4.30
    cpe:2.3:o:cisco:ios_xr:24.4.30
  • Cisco » Ios Xr » Version: 25.1.30
    cpe:2.3:o:cisco:ios_xr:25.1.30
  • Cisco » Ios Xr » Version: 25.2.1
    cpe:2.3:o:cisco:ios_xr:25.2.1
  • Cisco » Ios Xr » Version: 25.2.2
    cpe:2.3:o:cisco:ios_xr:25.2.2
  • Cisco » Ios Xr » Version: 25.2.30
    cpe:2.3:o:cisco:ios_xr:25.2.30
  • Cisco » Ios Xr » Version: 25.4.201
    cpe:2.3:o:cisco:ios_xr:25.4.201
  • Cisco » Ios Xr » Version: 26.1.2
    cpe:2.3:o:cisco:ios_xr:26.1.2
  • Cisco » Ios Xr » Version: 26.2.1
    cpe:2.3:o:cisco:ios_xr:26.2.1
  • Cisco » Ios Xr » Version: 26.2.101
    cpe:2.3:o:cisco:ios_xr:26.2.101
  • Cisco » Ios Xr » Version: 6.5.25
    cpe:2.3:o:cisco:ios_xr:6.5.25
  • Cisco » Ios Xr » Version: 6.5.26
    cpe:2.3:o:cisco:ios_xr:6.5.26
  • Cisco » Ios Xr » Version: 6.5.29
    cpe:2.3:o:cisco:ios_xr:6.5.29
  • Cisco » Ios Xr » Version: 6.5.32
    cpe:2.3:o:cisco:ios_xr:6.5.32
  • Cisco » Ios Xr » Version: 6.5.35
    cpe:2.3:o:cisco:ios_xr:6.5.35
  • Cisco » Ios Xr » Version: 6.5.352
    cpe:2.3:o:cisco:ios_xr:6.5.352
  • Cisco » Ios Xr » Version: 6.5.353
    cpe:2.3:o:cisco:ios_xr:6.5.353
  • Cisco » Ios Xr » Version: 6.5.90
    cpe:2.3:o:cisco:ios_xr:6.5.90
  • Cisco » Ios Xr » Version: 6.7.1
    cpe:2.3:o:cisco:ios_xr:6.7.1
  • Cisco » Ios Xr » Version: 6.7.2
    cpe:2.3:o:cisco:ios_xr:6.7.2
  • Cisco » Ios Xr » Version: 6.7.3
    cpe:2.3:o:cisco:ios_xr:6.7.3
  • Cisco » Ios Xr » Version: 6.7.35
    cpe:2.3:o:cisco:ios_xr:6.7.35
  • Cisco » Ios Xr » Version: 6.8.1
    cpe:2.3:o:cisco:ios_xr:6.8.1
  • Cisco » Ios Xr » Version: 6.9.1
    cpe:2.3:o:cisco:ios_xr:6.9.1
  • Cisco » Ios Xr » Version: 6.9.2
    cpe:2.3:o:cisco:ios_xr:6.9.2
  • Cisco » Ios Xr » Version: 7.0.0
    cpe:2.3:o:cisco:ios_xr:7.0.0
  • Cisco » Ios Xr » Version: 7.0.1
    cpe:2.3:o:cisco:ios_xr:7.0.1
  • Cisco » Ios Xr » Version: 7.0.11
    cpe:2.3:o:cisco:ios_xr:7.0.11
  • Cisco » Ios Xr » Version: 7.0.12
    cpe:2.3:o:cisco:ios_xr:7.0.12
  • Cisco » Ios Xr » Version: 7.0.14
    cpe:2.3:o:cisco:ios_xr:7.0.14
  • Cisco » Ios Xr » Version: 7.0.2
    cpe:2.3:o:cisco:ios_xr:7.0.2
  • Cisco » Ios Xr » Version: 7.1.1
    cpe:2.3:o:cisco:ios_xr:7.1.1
  • Cisco » Ios Xr » Version: 7.1.2
    cpe:2.3:o:cisco:ios_xr:7.1.2
  • Cisco » Ios Xr » Version: 7.1.3
    cpe:2.3:o:cisco:ios_xr:7.1.3
  • Cisco » Ios Xr » Version: 7.10.2
    cpe:2.3:o:cisco:ios_xr:7.10.2
  • Cisco » Ios Xr » Version: 7.11.1
    cpe:2.3:o:cisco:ios_xr:7.11.1
  • Cisco » Ios Xr » Version: 7.2.1
    cpe:2.3:o:cisco:ios_xr:7.2.1
  • Cisco » Ios Xr » Version: 7.2.12
    cpe:2.3:o:cisco:ios_xr:7.2.12
  • Cisco » Ios Xr » Version: 7.3.1
    cpe:2.3:o:cisco:ios_xr:7.3.1
  • Cisco » Ios Xr » Version: 7.3.16
    cpe:2.3:o:cisco:ios_xr:7.3.16
  • Cisco » Ios Xr » Version: 7.3.27
    cpe:2.3:o:cisco:ios_xr:7.3.27
  • Cisco » Ios Xr » Version: 7.3.3
    cpe:2.3:o:cisco:ios_xr:7.3.3
  • Cisco » Ios Xr » Version: 7.3.4
    cpe:2.3:o:cisco:ios_xr:7.3.4
  • Cisco » Ios Xr » Version: 7.3.5
    cpe:2.3:o:cisco:ios_xr:7.3.5
  • Cisco » Ios Xr » Version: 7.3.6
    cpe:2.3:o:cisco:ios_xr:7.3.6
  • Cisco » Ios Xr » Version: 7.4.1
    cpe:2.3:o:cisco:ios_xr:7.4.1
  • Cisco » Ios Xr » Version: 7.4.15
    cpe:2.3:o:cisco:ios_xr:7.4.15
  • Cisco » Ios Xr » Version: 7.4.16
    cpe:2.3:o:cisco:ios_xr:7.4.16
  • Cisco » Ios Xr » Version: 7.4.2
    cpe:2.3:o:cisco:ios_xr:7.4.2
  • Cisco » Ios Xr » Version: 7.5.1
    cpe:2.3:o:cisco:ios_xr:7.5.1
  • Cisco » Ios Xr » Version: 7.5.12
    cpe:2.3:o:cisco:ios_xr:7.5.12
  • Cisco » Ios Xr » Version: 7.5.2
    cpe:2.3:o:cisco:ios_xr:7.5.2
  • Cisco » Ios Xr » Version: 7.5.5
    cpe:2.3:o:cisco:ios_xr:7.5.5
  • Cisco » Ios Xr » Version: 7.5.52
    cpe:2.3:o:cisco:ios_xr:7.5.52
  • Cisco » Ios Xr » Version: 7.6.2
    cpe:2.3:o:cisco:ios_xr:7.6.2
  • Cisco » Ios Xr » Version: 7.6.3
    cpe:2.3:o:cisco:ios_xr:7.6.3
  • Cisco » Ios Xr » Version: 7.7.1
    cpe:2.3:o:cisco:ios_xr:7.7.1
  • Cisco » Ios Xr » Version: 7.7.2
    cpe:2.3:o:cisco:ios_xr:7.7.2
  • Cisco » Ios Xr » Version: 7.7.21
    cpe:2.3:o:cisco:ios_xr:7.7.21
  • Cisco » Ios Xr » Version: 7.8.12
    cpe:2.3:o:cisco:ios_xr:7.8.12
  • Cisco » Ios Xr » Version: 7.8.2
    cpe:2.3:o:cisco:ios_xr:7.8.2
  • Cisco » Ios Xr » Version: 7.8.22
    cpe:2.3:o:cisco:ios_xr:7.8.22
  • Cisco » Ios Xr » Version: 7.8.23
    cpe:2.3:o:cisco:ios_xr:7.8.23
  • Cisco » Ios Xr » Version: 7.9.1
    cpe:2.3:o:cisco:ios_xr:7.9.1
  • Cisco » Ios Xr » Version: 7.9.2
    cpe:2.3:o:cisco:ios_xr:7.9.2
  • Cisco » Ios Xr » Version: 7.9.21
    cpe:2.3:o:cisco:ios_xr:7.9.21


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