Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.

This vulnerability is due to incomplete error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00079.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Cyber Vision unknown
Version Status Constraints
3.0.0 affected
—
3.0.2 affected
—
3.0.3 affected
—
3.0.1 affected
—
3.1.0 affected
—
3.0.4 affected
—
3.1.1 affected
—
3.1.2 affected
—
3.2.0 affected
—
3.0.5 affected
—
3.2.1 affected
—
3.0.6 affected
—
3.2.2 affected
—
3.2.3 affected
—
3.2.4 affected
—
4.0.0 affected
—
4.0.1 affected
—
4.0.2 affected
—
4.0.3 affected
—
4.1.0 affected
—
4.1.1 affected
—
4.1.2 affected
—
4.1.3 affected
—
4.1.4 affected
—
4.2.0 affected
—
4.2.1 affected
—
4.1.5 affected
—
4.2.2 affected
—
4.2.X affected
—
4.2.3 affected
—
4.2.4 affected
—
4.2.6 affected
—
4.1.6 affected
—
4.3.0 affected
—
4.3.1 affected
—
4.3.2 affected
—
4.3.3 affected
—
4.4.0 affected
—
4.4.1 affected
—
4.4.2 affected
—
4.4.3 affected
—
4.1.7 affected
—
5.0.0 affected
—
5.0.1 affected
—
5.0.2 affected
—
5.1.0 affected
—
5.1.1 affected
—
5.1.2 affected
—
5.1.3 affected
—
5.2.0 affected
—
5.2.1 affected
—
5.3.0 affected
—
5.3.1 affected
—
5.3.2 affected
—
Cisco Cisco Secure Firewall Threat Defense (FTD) Software unknown
Version Status Constraints
7.2.4 affected
—
7.2.5 affected
—
7.2.4.1 affected
—
7.4.0 affected
—
7.2.5.1 affected
—
7.4.1 affected
—
7.2.6 affected
—
7.4.1.1 affected
—
7.2.7 affected
—
7.2.5.2 affected
—
7.2.8 affected
—
7.6.0 affected
—
7.4.2 affected
—
7.2.8.1 affected
—
7.4.2.1 affected
—
7.2.9 affected
—
7.7.0 affected
—
7.4.2.2 affected
—
7.2.10 affected
—
7.6.1 affected
—
7.4.2.3 affected
—
7.6.2 affected
—
7.7.10 affected
—
7.6.2.1 affected
—
7.7.10.1 affected
—
7.4.2.4 affected
—
7.2.10.2 affected
—
7.4.3 affected
—
Cisco Cisco UTD SNORT IPS Engine Software unknown
Version Status Constraints
17.3.1a affected
—
17.2.1r affected
—
17.3.2 affected
—
17.4.1a affected
—
17.5.1 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
—
17.7.1a affected
—
17.6.2 affected
—
17.8.1a 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
—
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 affected
—

No data.

No data.

Vendor Product Confidence Versions
Cisco Cisco Utd Snort Ips Engine Software 100%
Version Status Scheme Platform
17.3.1a
 affected generic —
17.2.1r
 affected generic —
17.3.2
 affected generic —
17.4.1a
 affected generic —
17.5.1
 affected generic —
17.3.3
 affected generic —
17.5.1a
 affected generic —
17.3.4
 affected generic —
17.3.4a
 affected generic —
17.4.2
 affected generic —
17.4.1b
 affected generic —
17.6.1a
 affected generic —
17.7.1a
 affected generic —
17.6.2
 affected generic —
17.8.1a
 affected generic —
17.3.5
 affected generic —
17.6.3
 affected generic —
17.6.3a
 affected generic —
17.7.2
 affected generic —
17.9.1a
 affected generic —
17.6.4
 affected generic —
17.10.1a
 affected generic —
17.3.6
 affected generic —
17.3.7
 affected generic —
17.9.2a
 affected generic —
17.6.5
 affected generic —
17.11.1a
 affected generic —
17.9.3a
 affected generic —
17.12.1a
 affected generic —
17.9.4
 affected generic —
17.6.6
 affected generic —
17.3.8
 affected generic —
17.3.8a
 affected generic —
17.6.6a
 affected generic —
17.9.4a
 affected generic —
17.12.2
 affected generic —
17.13.1a
 affected generic —
17.9.5a
 affected generic —
17.12.3
 affected generic —
17.15.1a
 affected generic —
17.6.7
 affected generic —
17.14.1a
 affected generic —
17.12.4
 affected generic —
17.12.3a
 affected generic —
17.15.2c
 affected generic —
17.9.5e
 affected generic —
17.12.4a
 affected generic —
17.15.2a
 affected generic —
17.12.5
 affected generic —
17.17.1
 affected generic —
17.12.5a
 affected generic —
17.9.7a
 affected generic —
17.15.3a
 affected generic —
17.15.3
 affected generic —
17.12.5b
 affected generic —
17.12.5c
 affected generic —
17.15.4
 affected generic —
17.9.7b
 affected generic —
17.18.1
 affected generic —
17.18.1a
 affected generic —
17.12.6
 affected generic —
17.9.8
 affected generic —
17.15.4c
 affected generic —
17.12.5d
 affected generic —
17.18.2
 affected generic —
Cisco Cyber Vision 86%
Version Status Scheme Platform
3.0.0
 affected semver —
3.0.2
 affected semver —
3.0.3
 affected semver —
3.0.1
 affected semver —
3.1.0
 affected semver —
3.0.4
 affected semver —
3.1.1
 affected semver —
3.1.2
 affected semver —
3.2.0
 affected semver —
3.0.5
 affected semver —
3.2.1
 affected semver —
3.0.6
 affected semver —
3.2.2
 affected semver —
3.2.3
 affected semver —
3.2.4
 affected semver —
4.0.0
 affected semver —
4.0.1
 affected semver —
4.0.2
 affected semver —
4.0.3
 affected semver —
4.1.0
 affected semver —
4.1.1
 affected semver —
4.1.2
 affected semver —
4.1.3
 affected semver —
4.1.4
 affected semver —
4.2.0
 affected semver —
4.2.1
 affected semver —
4.1.5
 affected semver —
4.2.2
 affected semver —
4.2.X
 affected generic —
4.2.3
 affected semver —
4.2.4
 affected semver —
4.2.6
 affected semver —
4.1.6
 affected semver —
4.3.0
 affected semver —
4.3.1
 affected semver —
4.3.2
 affected semver —
4.3.3
 affected semver —
4.4.0
 affected semver —
4.4.1
 affected semver —
4.4.2
 affected semver —
4.4.3
 affected semver —
4.1.7
 affected semver —
5.0.0
 affected semver —
5.0.1
 affected semver —
5.0.2
 affected semver —
5.1.0
 affected semver —
5.1.1
 affected semver —
5.1.2
 affected semver —
5.1.3
 affected semver —
5.2.0
 affected semver —
5.2.1
 affected semver —
5.3.0
 affected semver —
5.3.1
 affected semver —
5.3.2
 affected semver —
Cisco Secure Firewall Threat Defense 100%
Version Status Scheme Platform
7.2.4
 affected semver —
7.2.5
 affected semver —
7.2.4.1
 affected generic —
7.4.0
 affected semver —
7.2.5.1
 affected generic —
7.4.1
 affected semver —
7.2.6
 affected generic —
7.4.1.1
 affected generic —
7.2.7
 affected generic —
7.2.5.2
 affected generic —
7.2.8
 affected generic —
7.6.0
 affected semver —
7.4.2
 affected semver —
7.2.8.1
 affected generic —
7.4.2.1
 affected generic —
7.2.9
 affected generic —
7.7.0
 affected semver —
7.4.2.2
 affected generic —
7.2.10
 affected semver —
7.6.1
 affected semver —
7.4.2.3
 affected semver —
7.6.2
 affected semver —
7.7.10
 affected generic —
7.6.2.1
 affected generic —
7.7.10.1
 affected generic —
7.4.2.4
 affected generic —
7.2.10.2
 affected generic —
7.4.3
 affected semver —

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Project Subscriptions

Vendors Products
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Cyber Vision Subscribe
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz cve-icon cve-icon
History

Thu, 05 Mar 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco cisco Utd Snort Ips Engine Software
Cisco cyber Vision
Cisco secure Firewall Threat Defense
Vendors & Products Cisco
Cisco cisco Utd Snort Ips Engine Software
Cisco cyber Vision
Cisco secure Firewall Threat Defense

Wed, 04 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 04 Mar 2026 18:00:00 +0000

Type Values Removed Values Added
Description Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.
Title Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability
Weaknesses CWE-248
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-03-04T20:26:35.118Z

Reserved: 2025-10-08T11:59:15.357Z

Link: CVE-2026-20068

cve-icon Vulnrichment

Updated: 2026-03-04T20:26:29.991Z

cve-icon NVD

Status : Received

Published: 2026-03-04T18:16:22.330

Modified: 2026-03-04T18:16:22.330

Link: CVE-2026-20068

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-05T09:06:11Z

Weaknesses