Improper Resource Control in Cisco IOS XR Software
CVE-2026-20274

9.8CRITICAL

Key Information:

Vendor

Cisco
Status
Cisco iOS Xr Software
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-20274?

The vulnerability in Cisco IOS XR Software arises from improper resource control, potentially allowing adversaries to exploit specific system interactions. As part of Cisco's dedication to enhancing product security, new hardening updates have been released to mitigate risks associated with this issue. Organizations utilizing affected versions should promptly apply the latest software updates to safeguard their network infrastructure.

Affected Version(s)

Cisco IOS XR Software 6.5.29

Cisco IOS XR Software 7.0.1

Cisco IOS XR Software 6.5.26

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.