DCE/RPC Processing Vulnerability in Cisco Snort 3
CVE-2026-20027

5.3MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Secure Firewall Threat Defense (ftd) Software
Cisco Utd Snort Ips Engine Software
Vendor
CVE Published:
7 January 2026

Badges

👾 Exploit Exists

What is CVE-2026-20027?

A vulnerability exists in Cisco Snort 3 due to improper buffer handling in the processing of DCE/RPC requests. This flaw can allow unauthenticated attackers to trigger out-of-bounds read conditions by sending excessive DCE/RPC requests over established connections monitored by Snort 3. As a result, sensitive information could be disclosed or the Snort 3 Detection Engine could be prompted to restart, disrupting packet inspection functions and leading to potential data exposure.

Affected Version(s)

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.0

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.0.1

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.1

References

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

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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