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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Cisco / Cisco IOS XR Software6.5.29 – 6.5.29
- Cisco / Cisco IOS XR Software7.0.1 – 7.0.1
- Cisco / Cisco IOS XR Software6.5.26 – 6.5.26
- Cisco / Cisco IOS XR Software6.5.25 – 6.5.25
- Cisco / Cisco IOS XR Software6.5.28 – 6.5.28
- Cisco / Cisco IOS XR Software6.5.90 – 6.5.90
- Cisco / Cisco IOS XR Software7.1.1 – 7.1.1
- Cisco / Cisco IOS XR Software7.0.90 – 7.0.90
- Cisco / Cisco IOS XR Software6.7.1 – 6.7.1
- Cisco / Cisco IOS XR Software7.0.2 – 7.0.2
- Cisco / Cisco IOS XR Software7.1.15 – 7.1.15
- Cisco / Cisco IOS XR Software7.2.1 – 7.2.1
- Cisco / Cisco IOS XR Software7.1.2 – 7.1.2
- Cisco / Cisco IOS XR Software6.7.2 – 6.7.2
- Cisco / Cisco IOS XR Software7.0.11 – 7.0.11
- Cisco / Cisco IOS XR Software7.0.12 – 7.0.12
- Cisco / Cisco IOS XR Software7.0.14 – 7.0.14
- Cisco / Cisco IOS XR Software7.1.25 – 7.1.25
- Cisco / Cisco IOS XR Software7.2.12 – 7.2.12
- Cisco / Cisco IOS XR Software7.3.1 – 7.3.1
- Cisco / Cisco IOS XR Software7.1.3 – 7.1.3
- Cisco / Cisco IOS XR Software6.7.3 – 6.7.3
- Cisco / Cisco IOS XR Software7.4.1 – 7.4.1
- Cisco / Cisco IOS XR Software7.2.2 – 7.2.2
- Cisco / Cisco IOS XR Software6.7.4 – 6.7.4
- Cisco / Cisco IOS XR Software6.5.31 – 6.5.31
- Cisco / Cisco IOS XR Software7.3.15 – 7.3.15
- Cisco / Cisco IOS XR Software7.3.16 – 7.3.16
- Cisco / Cisco IOS XR Software6.8.1 – 6.8.1
- Cisco / Cisco IOS XR Software7.4.15 – 7.4.15
- Cisco / Cisco IOS XR Software6.5.32 – 6.5.32
- Cisco / Cisco IOS XR Software7.3.2 – 7.3.2
- Cisco / Cisco IOS XR Software7.5.1 – 7.5.1
- Cisco / Cisco IOS XR Software7.4.16 – 7.4.16
- Cisco / Cisco IOS XR Software7.3.27 – 7.3.27
- Cisco / Cisco IOS XR Software7.6.1 – 7.6.1
- Cisco / Cisco IOS XR Software7.5.2 – 7.5.2
- Cisco / Cisco IOS XR Software7.8.1 – 7.8.1
- Cisco / Cisco IOS XR Software7.6.15 – 7.6.15
- Cisco / Cisco IOS XR Software7.5.12 – 7.5.12
- Cisco / Cisco IOS XR Software7.8.12 – 7.8.12
- Cisco / Cisco IOS XR Software7.3.3 – 7.3.3
- Cisco / Cisco IOS XR Software7.7.1 – 7.7.1
- Cisco / Cisco IOS XR Software6.8.2 – 6.8.2
- Cisco / Cisco IOS XR Software7.3.4 – 7.3.4
- Cisco / Cisco IOS XR Software7.4.2 – 7.4.2
- Cisco / Cisco IOS XR Software6.7.35 – 6.7.35
- Cisco / Cisco IOS XR Software6.9.1 – 6.9.1
- Cisco / Cisco IOS XR Software7.6.2 – 7.6.2
- Cisco / Cisco IOS XR Software7.5.3 – 7.5.3
- Cisco / Cisco IOS XR Software7.7.2 – 7.7.2
- Cisco / Cisco IOS XR Software6.9.2 – 6.9.2
- Cisco / Cisco IOS XR Software7.9.1 – 7.9.1
- Cisco / Cisco IOS XR Software7.10.1 – 7.10.1
- Cisco / Cisco IOS XR Software7.8.2 – 7.8.2
- Cisco / Cisco IOS XR Software7.5.4 – 7.5.4
- Cisco / Cisco IOS XR Software6.5.33 – 6.5.33
- Cisco / Cisco IOS XR Software7.8.22 – 7.8.22
- Cisco / Cisco IOS XR Software7.7.21 – 7.7.21
- Cisco / Cisco IOS XR Software7.9.2 – 7.9.2
- Cisco / Cisco IOS XR Software7.3.5 – 7.3.5
- Cisco / Cisco IOS XR Software7.5.5 – 7.5.5
- Cisco / Cisco IOS XR Software7.11.1 – 7.11.1
- Cisco / Cisco IOS XR Software7.9.21 – 7.9.21
- Cisco / Cisco IOS XR Software7.10.2 – 7.10.2
- Cisco / Cisco IOS XR Software24.1.1 – 24.1.1
- Cisco / Cisco IOS XR Software7.6.3 – 7.6.3
- Cisco / Cisco IOS XR Software7.3.6 – 7.3.6
- Cisco / Cisco IOS XR Software7.5.52 – 7.5.52
- Cisco / Cisco IOS XR Software7.11.2 – 7.11.2
- Cisco / Cisco IOS XR Software24.2.1 – 24.2.1
- Cisco / Cisco IOS XR Software24.1.2 – 24.1.2
- Cisco / Cisco IOS XR Software24.2.11 – 24.2.11
- Cisco / Cisco IOS XR Software24.3.1 – 24.3.1
- Cisco / Cisco IOS XR Software24.4.1 – 24.4.1
- Cisco / Cisco IOS XR Software24.2.2 – 24.2.2
- Cisco / Cisco IOS XR Software7.8.23 – 7.8.23
- Cisco / Cisco IOS XR Software7.11.21 – 7.11.21
- Cisco / Cisco IOS XR Software24.2.20 – 24.2.20
- Cisco / Cisco IOS XR Software24.3.2 – 24.3.2
- Cisco / Cisco IOS XR Software24.4.10 – 24.4.10
- Cisco / Cisco IOS XR Software6.5.35 – 6.5.35
- Cisco / Cisco IOS XR Software25.1.1 – 25.1.1
- Cisco / Cisco IOS XR Software24.4.2 – 24.4.2
- Cisco / Cisco IOS XR Software24.3.20 – 24.3.20
- Cisco / Cisco IOS XR Software24.4.15 – 24.4.15
- Cisco / Cisco IOS XR Software25.2.1 – 25.2.1
- Cisco / Cisco IOS XR Software6.5.351 – 6.5.351
- Cisco / Cisco IOS XR Software25.1.2 – 25.1.2
- Cisco / Cisco IOS XR Software24.3.30 – 24.3.30
- Cisco / Cisco IOS XR Software25.3.1 – 25.3.1
- Cisco / Cisco IOS XR Software6.5.352 – 6.5.352
- Cisco / Cisco IOS XR Software24.4.30 – 24.4.30
- Cisco / Cisco IOS XR Software24.2.21 – 24.2.21
- Cisco / Cisco IOS XR Software25.4.1 – 25.4.1
- Cisco / Cisco IOS XR Software25.2.2 – 25.2.2
- Cisco / Cisco IOS XR Software25.2.15 – 25.2.15
- Cisco / Cisco IOS XR Software7.2.0 – 7.2.0
- Cisco / Cisco IOS XR Software7.0.0 – 7.0.0
- Cisco / Cisco IOS XR Software25.2.30 – 25.2.30
- Cisco / Cisco IOS XR Software6.5.353 – 6.5.353
- Cisco / Cisco IOS XR Software26.1.1 – 26.1.1
- Cisco / Cisco IOS XR Software25.1.30 – 25.1.30
- Cisco / Cisco IOS XR Software25.3.15 – 25.3.15
- Cisco / Cisco IOS XR Software26.2.100 – 26.2.100
- Cisco / Cisco IOS XR Software25.4.2 – 25.4.2
- Cisco / Cisco IOS XR Software26.2.1 – 26.2.1
- Cisco / Cisco IOS XR Software25.4.30 – 25.4.30
- Cisco / Cisco IOS XR Software26.1.2 – 26.1.2
- Cisco / Cisco IOS XR Software25.4.201 – 25.4.201
- Cisco / Cisco IOS XR Software26.2.101 – 26.2.101
- Cisco / Cisco IOS XR Software25.2.21 – 25.2.21
- Cisco / ios_xr6.5.25 – 6.5.25
- Cisco / ios_xr6.5.26 – 6.5.26
- Cisco / ios_xr6.5.28 – 6.5.28
- Cisco / ios_xr6.5.29 – 6.5.29
- Cisco / ios_xr6.5.31 – 6.5.31
- Cisco / ios_xr6.5.32 – 6.5.32
- Cisco / ios_xr6.5.33 – 6.5.33
- Cisco / ios_xr6.5.35 – 6.5.35
- Cisco / ios_xr6.5.90 – 6.5.90
- Cisco / ios_xr6.5.351 – 6.5.351
- Cisco / ios_xr6.5.352 – 6.5.352
- Cisco / ios_xr6.5.353 – 6.5.353
- Cisco / ios_xr6.7.1 – 6.7.1
- Cisco / ios_xr6.7.2 – 6.7.2
- Cisco / ios_xr6.7.3 – 6.7.3
- Cisco / ios_xr6.7.4 – 6.7.4
- Cisco / ios_xr6.7.35 – 6.7.35
- Cisco / ios_xr6.8.1 – 6.8.1
- Cisco / ios_xr6.8.2 – 6.8.2
- Cisco / ios_xr6.9.1 – 6.9.1
- Cisco / ios_xr6.9.2 – 6.9.2
- Cisco / ios_xr7.0.0 – 7.0.0
- Cisco / ios_xr7.0.1 – 7.0.1
- Cisco / ios_xr7.0.2 – 7.0.2
- Cisco / ios_xr7.0.11 – 7.0.11
- Cisco / ios_xr7.0.12 – 7.0.12
- Cisco / ios_xr7.0.14 – 7.0.14
- Cisco / ios_xr7.0.90 – 7.0.90
- Cisco / ios_xr7.1.1 – 7.1.1
- Cisco / ios_xr7.1.2 – 7.1.2
- Cisco / ios_xr7.1.3 – 7.1.3
- Cisco / ios_xr7.1.15 – 7.1.15
- Cisco / ios_xr7.1.25 – 7.1.25
- Cisco / ios_xr7.2.0 – 7.2.0
- Cisco / ios_xr7.2.1 – 7.2.1
- Cisco / ios_xr7.2.2 – 7.2.2
- Cisco / ios_xr7.2.12 – 7.2.12
- Cisco / ios_xr7.3.1 – 7.3.1
- Cisco / ios_xr7.3.2 – 7.3.2
- Cisco / ios_xr7.3.3 – 7.3.3
- Cisco / ios_xr7.3.4 – 7.3.4
- Cisco / ios_xr7.3.5 – 7.3.5
- Cisco / ios_xr7.3.6 – 7.3.6
- Cisco / ios_xr7.3.15 – 7.3.15
- Cisco / ios_xr7.3.16 – 7.3.16
- Cisco / ios_xr7.3.27 – 7.3.27
- Cisco / ios_xr7.4.1 – 7.4.1
- Cisco / ios_xr7.4.2 – 7.4.2
- Cisco / ios_xr7.4.15 – 7.4.15
- Cisco / ios_xr7.4.16 – 7.4.16
- Cisco / ios_xr7.5.1 – 7.5.1
- Cisco / ios_xr7.5.2 – 7.5.2
- Cisco / ios_xr7.5.3 – 7.5.3
- Cisco / ios_xr7.5.4 – 7.5.4
- Cisco / ios_xr7.5.5 – 7.5.5
- Cisco / ios_xr7.5.12 – 7.5.12
- Cisco / ios_xr7.5.52 – 7.5.52
- Cisco / ios_xr7.6.1 – 7.6.1
- Cisco / ios_xr7.6.2 – 7.6.2
- Cisco / ios_xr7.6.3 – 7.6.3
- Cisco / ios_xr7.6.15 – 7.6.15
- Cisco / ios_xr7.7.1 – 7.7.1
- Cisco / ios_xr7.7.2 – 7.7.2
- Cisco / ios_xr7.7.21 – 7.7.21
- Cisco / ios_xr7.8.1 – 7.8.1
- Cisco / ios_xr7.8.2 – 7.8.2
- Cisco / ios_xr7.8.12 – 7.8.12
- Cisco / ios_xr7.8.22 – 7.8.22
- Cisco / ios_xr7.8.23 – 7.8.23
- Cisco / ios_xr7.9.1 – 7.9.1
- Cisco / ios_xr7.9.2 – 7.9.2
- Cisco / ios_xr7.9.21 – 7.9.21
- Cisco / ios_xr7.10.1 – 7.10.1
- Cisco / ios_xr7.10.2 – 7.10.2
- Cisco / ios_xr7.11.1 – 7.11.1
- Cisco / ios_xr7.11.2 – 7.11.2
- Cisco / ios_xr7.11.21 – 7.11.21
- Cisco / ios_xr24.1.1 – 24.1.1
- Cisco / ios_xr24.1.2 – 24.1.2
- Cisco / ios_xr24.2.1 – 24.2.1
- Cisco / ios_xr24.2.2 – 24.2.2
- Cisco / ios_xr24.2.11 – 24.2.11
- Cisco / ios_xr24.2.20 – 24.2.20
- Cisco / ios_xr24.2.21 – 24.2.21
- Cisco / ios_xr24.3.1 – 24.3.1
- Cisco / ios_xr24.3.2 – 24.3.2
- Cisco / ios_xr24.3.20 – 24.3.20
- Cisco / ios_xr24.3.30 – 24.3.30
- Cisco / ios_xr24.4.1 – 24.4.1
- Cisco / ios_xr24.4.2 – 24.4.2
- Cisco / ios_xr24.4.10 – 24.4.10
- Cisco / ios_xr24.4.15 – 24.4.15
- Cisco / ios_xr24.4.30 – 24.4.30
- Cisco / ios_xr25.1.1 – 25.1.1
- Cisco / ios_xr25.1.2 – 25.1.2
- Cisco / ios_xr25.1.30 – 25.1.30
- Cisco / ios_xr25.2.1 – 25.2.1
- Cisco / ios_xr25.2.2 – 25.2.2
- Cisco / ios_xr25.2.15 – 25.2.15
- Cisco / ios_xr25.2.30 – 25.2.30
- Cisco / ios_xr25.3.1 – 25.3.1
- Cisco / ios_xr25.3.15 – 25.3.15
- Cisco / ios_xr25.4.1 – 25.4.1
- Cisco / ios_xr25.4.2 – 25.4.2
- Cisco / ios_xr25.4.30 – 25.4.30
- Cisco / ios_xr25.4.201 – 25.4.201
- Cisco / ios_xr26.1.1 – 26.1.1
- Cisco / ios_xr26.1.2 – 26.1.2
- Cisco / ios_xr26.2.1 – 26.2.1
- Cisco / ios_xr26.2.100 – 26.2.100
- Cisco / ios_xr26.2.101 – 26.2.101
Updated 10m ago · 8 sources