What is the CVSS score of CVE-2026-20050?

CVE-2026-20050 has a CVSS 3.1 base score of 6.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Cisco are affected by CVE-2026-20050?

CVE-2026-20050 presents notable security risk rated CVSS 6.8. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-20050?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Cisco CVE-2026-20050

MEDIUM

Improper Resource Shutdown or Release (CWE-404)

2026-03-04 psirt@cisco.com

Cisco Denial Of Service

6.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.8 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

CVE Published

Mar 04, 2026 - 18:16 nvd

MEDIUM 6.8

DescriptionCVE.org

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 only affects traffic that is encrypted by TLS 1.2. Other versions of TLS are not affected.

AnalysisAI

Device reloads in Cisco Secure Firewall Threat Defense can be triggered by unauthenticated remote attackers sending specially crafted TLS 1.2 traffic through the SSL decryption feature, exploiting improper memory management in the Do Not Decrypt exclusion logic. The vulnerability requires specific network conditions and TLS 1.2 traffic to trigger, resulting in denial of service with no authentication required. No patch is currently available for this medium-severity issue affecting Cisco and TLS implementations.

Technical ContextAI

Classified as CWE-404 (Improper Resource Shutdown or Release). 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.