CVE-2026-20027
Cisco Snort DCERPC Stub Data Out of Bounds Read
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jan 7, 2026
- Updated
- Feb 12, 2026
- Reserved
- Oct 8, 2025
Description
Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection.
This vulnerability is due to an error in buffer handling logic when processing DCE/RPC requests, which can result in a buffer out-of-bounds read. An attacker could exploit this vulnerability by sending a large number of DCE/RPC requests through an established connection that is inspected by Snort 3. A successful exploit could allow the attacker to obtain sensitive information in the Snort 3 data stream.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | cisco |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
Cisco Secure Firewall Threat Defense (FTD) SoftwareCisco |
|
Cisco UTD SNORT IPS Engine SoftwareCisco |
|
References
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