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Advisory severityMedium6.8Cisco

Medium [CVE-2026-20050] Cisco Secure Firewall Threat Defense Software SSL Decryption Policy Denial of Service Vulnerability

This medium-severity Cisco advisory covers CVE-2026-20050; related products: Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.1, Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.2, Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.3.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

cisco-sa-ftd-dnd-dos-bpEcg7B7 Source published Source updated

VulniPulse record published

CVE-2026-20050
Related products & platforms
CiscoFirewallASA / Firepower
Open source advisory

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Summary

A vulnerability in the Do Not Decrypt exclusion feature of the SSL decryption feature of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper memory management during the inspection of TLS 1.2 encrypted traffic. An attacker could exploit this vulnerability by sending crafted TLS 1.2 encrypted traffic through an affected device.

A successful exploit could allow the attacker to cause a reload of an affected device. Note: This vulnerability on…

Affected products named by the advisory: Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.1; Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.2; Cisco Secure Firewall Threat Defense (FTD) Software 7.1.0.3; Cisco Secure Firewall Threat Defense (FTD) Software 7.2.0.1; and 4 more.

Affected versions
  • Scope: At the time of publication, this vulnerability affected Cisco devices if they were running a vulnerable release of Cisco Secure FTD Software and had a Do Not Decrypt exception configured for an SSL decryption policy.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Mitigation checklist

Workaround status
  • There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Discussion(0)

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