A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart.
This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet inspection. An attacker could exploit this vulnerability by sending crafted SSL packets through an established connection to be parsed by the Snort 3 Detection Engine. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.
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Affected Vendors & Products
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History
Wed, 04 Mar 2026 21:15:00 +0000
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ssvc
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Wed, 04 Mar 2026 18:00:00 +0000
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| Description | A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet inspection. An attacker could exploit this vulnerability by sending crafted SSL packets through an established connection to be parsed by the Snort 3 Detection Engine. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts. | |
| Title | Cisco Secure Firewall Threat Defense Software Snort 3 Memory Management Denial of Service Vulnerability | |
| Weaknesses | CWE-788 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: cisco
Published: 2026-03-04T17:46:57.096Z
Updated: 2026-03-04T20:46:43.211Z
Reserved: 2025-10-08T11:59:15.355Z
Link: CVE-2026-20052
Updated: 2026-03-04T20:46:39.793Z
Status : Received
Published: 2026-03-04T18:16:19.420
Modified: 2026-03-04T18:16:19.420
Link: CVE-2026-20052
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