CVE-2026-20052
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.8
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- EPSS probability
- 0.41%
- CWE
- CWE-788
- Published
- 2026-03-04
- Last modified
- 2026-03-12
Affected products
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
- Cisco Cisco Secure Firewall Threat Defense (FTD) Software
Weakness type
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