Remote Denial of Service Vulnerability in Cisco IOS XE Software's NBAR Feature
CVE-2025-20315

8.6HIGH

Key Information:

Vendor

Cisco
Status
Cisco iOS Xe Software
Vendor
CVE Published:
24 September 2025

Badges

👾 Exploit Exists

What is CVE-2025-20315?

A vulnerability exists in the Network-Based Application Recognition (NBAR) feature of Cisco IOS XE Software, which can be exploited by an unauthenticated remote attacker. This issue arises from the improper handling of malformed Control and Provisioning of Wireless Access Points (CAPWAP) packets. By sending these malformed packets to an affected device, an attacker could trigger an unexpected reload, leading to a denial of service condition. Organizations using Cisco IOS XE Software should review their configurations and apply mitigations as necessary.

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Affected Version(s)

Cisco IOS XE Software 3.7.0S

Cisco IOS XE Software 3.7.1S

Cisco IOS XE Software 3.7.2S

References

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

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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