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.

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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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