CVE-2026-20027

MediumCVSS 5.3/10Last modified Oct 26, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

Affected software

VendorProductVersions
CiscoCisco Secure Firewall Threat Defense (FTD) Software7.0.0; 7.0.0.1; 7.0.1; 7.1.0; 7.0.1.1; 7.1.0.1; 7.0.2; 7.2.0; 7.0.2.1; 7.0.3; 7.1.0.2; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 7.3.0; 7.2.2; 7.2.3; 7.3.1; 7.1.0.3
CiscoCisco UTD SNORT IPS Engine Software3.17.1S; 16.12.3; Fuji-16.9.5; 16.12.4; 17.3.1a; 16.6.6; 16.12.2; Fuji-16.9.6; 3.17.0S; Fuji-16.9.3; Denali-16.3.7; Fuji-16.9.2; Fuji-16.9.4; Everest-16.6.4; Everest-16.6.3; 16.6.5; Denali-16.3.5; 17.2.1r; 17.1.1; Everest-16.6.2

References

Timeline

Published
Jan 7, 2026
Last modified
Oct 26, 2026
NVD status
Deferred

Related CVEs from 2026

CVE-2026-200285.0A vulnerability in the network driver of Cisco Terminal Service (TS) Agent could allow an authenticated, remote attacker to bypass firewall CVE-2026-200294.9A vulnerability in the licensing features of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) coCVE-2026-20034.3Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled ouCVE-2026-2003010.0As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team has conducted a compreCVE-2026-200315.3A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial CVE-2026-200324.4A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, local attacker with low privileges to escapeCVE-2026-200337.4A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial oCVE-2026-200348.8A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbCVE-2026-200357.2A vulnerability in the web UI of Cisco Unity Connection Web Inbox could allow an unauthenticated, remote attacker to conduct SSRF attacks thCVE-2026-200366.5A vulnerability in the CLI and web-based management interface of Cisco UCS Manager Software could allow an authenticated, remote attacker wiCVE-2026-200374.4A vulnerability in the NX-OS CLI privilege levels of Cisco UCS Manager Software could allow an authenticated, local attacker with read-only CVE-2026-200385.8A vulnerability in the endpoint group (EPG) contract functionality of Cisco Nexus 9000 Series Fabric Switches in ACI Mode could allow an una
CVE-2026-20027: Medium severity, CVSS 5.3 | Vulnix