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Permalink CVE-2026-20275
8.8 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Adjacent (A)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Adjacent (A)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
created 2 weeks ago Activity log
  • Created & dismissed (no matching packages found) suggestion 2 weeks ago
Cisco IOS XR Software Security Hardening Release: September 2026

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-2026-20275 are related to incorrect calculation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-682.

Affected products

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