Vulnerability-Lookup

BDU:2026-01755 (CVE-2026-20026)

Vulnerability from fstec – Published: 2026-02-13 – Updated: 2026-02-13 – View on bdu.fstec.ru Exploit exists Fixed

Title

Уязвимость механизма обнаружения Snort программного межсетевого экрана Cisco Secure Firewall Threat Defense (FTD), позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость механизма обнаружения Snort программного межсетевого экрана Cisco Secure Firewall Threat Defense (FTD) связана с ошибкой повторного освобождения памяти. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании

Severity

10.0 (High) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:C/I:C/A:C

9.8 (Critical) CVSS 3.1


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-415 - Повторное освобождение

Aliases

CVE-2026-20026, CISCO-SA-SNORT3-DCERPC-VULNS-J9HNF4TH, ZDI-26-046, ZDI-CAN-27892

References

1 reference

URL
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…

Impacted products

2 products from 2 vendors

Vendors

Cisco Systems, Inc.

Products

Snort, Cisco Secure Firewall Threat Defense (FTD)

Versions

3 (Snort), 7.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10.1 (Cisco Secure Firewall Threat Defense (FTD))

Product types

Security software, Security device

Mitigations

Использование рекомендаций производителя: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-dcerpc-vulns-J9HNF4tH

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "3 (Snort), 7.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.1.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10.1 (Cisco Secure Firewall Threat Defense (FTD))",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-dcerpc-vulns-J9HNF4tH",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "07.01.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "13.02.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "13.02.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-01755",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-20026, CISCO-SA-snort3-dcerpc-vulns-J9HNF4tH, ZDI-26-046, ZDI-CAN-27892",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Snort, Cisco Secure Firewall Threat Defense (FTD)",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": null,
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f Snort \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043c\u0435\u0436\u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u044d\u043a\u0440\u0430\u043d\u0430 Cisco Secure Firewall Threat Defense (FTD), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u0435 (CWE-415)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f Snort \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043c\u0435\u0436\u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u044d\u043a\u0440\u0430\u043d\u0430 Cisco Secure Firewall Threat Defense (FTD) \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u0433\u043e \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-dcerpc-vulns-J9HNF4tH",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e \u0437\u0430\u0449\u0438\u0442\u044b, \u0421\u0440\u0435\u0434\u0441\u0442\u0432\u043e \u0437\u0430\u0449\u0438\u0442\u044b",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-415",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 10)\n\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 9,8)"
}

CISCO-SA-SNORT3-DCERPC-VULNS-J9HNF4TH

Vulnerability from csaf_cisco - Published: 2026-01-07 16:00 - Updated: 2026-02-10 20:42

Summary

Multiple Cisco Products Snort 3 Distributed Computing Environment/Remote Procedure Call Vulnerabilities

Scope

2 vulnerabilities in this advisory.

Open the full advisory

CVE-2026-20026 (GCVE-0-2026-20026)

Vulnerability from cvelistv5 – Published: 2026-01-07 16:23 – Updated: 2026-02-12 18:48

Title

Multiple Cisco Products Snort 3 DCERPC Vulnerabilities

Summary

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 use-after-free 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 unexpectedly restart the Snort 3 Detection Engine, which could cause a denial of service (DoS).

Severity

5.8 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-07 16:53 UTC

CWE

CWE-415 - Double Free

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

2 products

Vendor	Product	Version
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	Affected: 7.0.0 Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.1.0 Affected: 7.0.1.1 Affected: 7.1.0.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.1.0.2 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.3.1 Affected: 7.1.0.3 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.5 Affected: 7.2.4.1 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.0.6.2 Affected: 7.4.1.1 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.2.10.2 Affected: 7.4.3
Cisco	Cisco UTD SNORT IPS Engine Software	Affected: 3.17.1S Affected: 16.12.3 Affected: Fuji-16.9.5 Affected: 16.12.4 Affected: 17.3.1a Affected: 16.6.6 Affected: 16.12.2 Affected: Fuji-16.9.6 Affected: 3.17.0S Affected: Fuji-16.9.3 Affected: Denali-16.3.7 Affected: Fuji-16.9.2 Affected: Fuji-16.9.4 Affected: Everest-16.6.4 Affected: Everest-16.6.3 Affected: 16.6.5 Affected: Denali-16.3.5 Affected: 17.2.1r Affected: 17.1.1 Affected: Everest-16.6.2 Affected: 16.6.7a Affected: Denali-16.3.4 Affected: 16.6.1 Affected: Denali-16.3.9 Affected: Denali-16.3.3 Affected: 16.12.1a Affected: 17.3.2 Affected: 17.4.1a Affected: 16.12.5 Affected: 17.5.1 Affected: Fuji-16.9.7 Affected: 16.6.9 Affected: 17.3.3 Affected: 17.5.1a Affected: 17.3.4 Affected: 17.3.4a Affected: 17.4.2 Affected: 17.4.1b Affected: 17.6.1a Affected: 16.6.10 Affected: 17.7.1a Affected: 16.12.6 Affected: Fuji-16.9.8 Affected: 17.6.2 Affected: 17.8.1a Affected: 16.12.7 Affected: 17.3.5 Affected: 17.6.3 Affected: 17.6.3a Affected: 17.7.2 Affected: 17.9.1a Affected: 17.6.4 Affected: 17.10.1a Affected: 17.3.6 Affected: 16.12.8 Affected: 17.3.7 Affected: 17.9.2a Affected: 17.6.5 Affected: 17.11.1a Affected: 17.9.3a Affected: 17.12.1a Affected: 17.9.4 Affected: 17.6.6 Affected: 17.3.8 Affected: 17.3.8a Affected: 17.6.6a Affected: 17.9.4a Affected: 17.12.2 Affected: 17.13.1a Affected: 17.9.5a Affected: 17.12.3 Affected: 17.6.7 Affected: 17.14.1a Affected: 17.12.4 Affected: 17.12.3a Affected: 17.15.1a Affected: 17.6.8 Affected: 17.9.6 Affected: 17.6.8a Affected: 17.16.1a Affected: 17.9.5e Affected: 17.12.4a Affected: 17.15.2c Affected: 17.9.5f Affected: 17.12.4b Affected: 17.15.2a Affected: 17.12.5 Affected: 17.17.1 Affected: 17.12.5a Affected: 17.9.7a Affected: 17.15.3a Affected: 17.15.3 Affected: 17.12.5b Affected: 17.12.5c Affected: 17.15.4 Affected: 17.9.7b Affected: 17.18.1 Affected: 17.18.1a Affected: 17.12.6 Affected: 17.9.8 Affected: 17.15.4c Affected: 17.12.5d Affected: 17.18.2

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                "id": "CVE-2026-20026",
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            },
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              "status": "affected",
              "version": "17.17.1"
            },
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              "version": "17.12.5a"
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              "version": "17.9.7a"
            },
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            },
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              "version": "17.12.5b"
            },
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              "version": "17.15.4"
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              "version": "17.9.7b"
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              "version": "17.18.1"
            },
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              "status": "affected",
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Multiple\u0026nbsp;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.\r\n\r\nThis vulnerability is due to an error in buffer handling logic when processing DCE/RPC requests, which can result in a buffer use-after-free 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 unexpectedly restart the Snort 3 Detection Engine, which could cause a denial of service (DoS)."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-415",
              "description": "Double Free",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-12T18:48:34.084Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-snort3-dcerpc-vulns-J9HNF4tH",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-dcerpc-vulns-J9HNF4tH"
        }
      ],
      "source": {
        "advisory": "cisco-sa-snort3-dcerpc-vulns-J9HNF4tH",
        "defects": [
          "CSCwq75339"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Multiple Cisco Products Snort 3 DCERPC Vulnerabilities"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20026",
    "datePublished": "2026-01-07T16:23:43.283Z",
    "dateReserved": "2025-10-08T11:59:15.352Z",
    "dateUpdated": "2026-02-12T18:48:34.084Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2026-01755 (CVE-2026-20026)

CISCO-SA-SNORT3-DCERPC-VULNS-J9HNF4TH

CVE-2026-20026 (GCVE-0-2026-20026)

Tags

Sightings

Nomenclature

Related by attack behaviour