CVE-2026-20067Disclosure(cisco / cyber_vision)

LOWCVSS 5.8 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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 the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP 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.

cisco CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz

Weakness type (CWE)

CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

cyber_vision
secure_firewall_threat_defense
snort
unified_threat_defense_snort_intrusion_prevention_system_engine

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

cisco

Products

cyber_visionsecure_firewall_threat_defensesnortunified_threat_defense_snort_intrusion_prevention_system_engine

181 versions affected across 4 products

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Vulmon Vulnerability Feed@VulmonFeeds218d
Disclosure
CVE-2026-20067 Cisco Snort 3 Detection Engine Remote Denial of Service via HTTP Packet Parsing https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-20067
Post summary
The text announces a new remote denial‑of‑service vulnerability in Cisco Snort 3’s HTTP packet parsing, with no evidence of PoC, exploit code, or active exploitation, and no mitigations referenced.
0000055
4.0K followersView on X
CVE@CVEnew218d
Disclosure
CVE-2026-20067 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 Dete… https://www.cve.org/CVERecord?id=CVE-2026-20067
Post summary
CVE-2026-20067 is a vulnerability affecting multiple Cisco products, allowing an unauthenticated remote attacker to disrupt the Snort 3 detection engine; the post provides only the basic disclosure without details on PoC, exploitation, or mitigations.
0000083
56.6K followersView on X

CPE platform detail182 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

182 of 182 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	cisco	cyber_vision	3.0.0	-	-
App	cisco	cyber_vision	3.0.1	-	-
App	cisco	cyber_vision	3.0.2	-	-
App	cisco	cyber_vision	3.0.3	-	-
App	cisco	cyber_vision	3.0.4	-	-
App	cisco	cyber_vision	3.0.5	-	-
App	cisco	cyber_vision	3.0.6	-	-
App	cisco	cyber_vision	3.1.0	-	-
App	cisco	cyber_vision	3.1.1	-	-
App	cisco	cyber_vision	3.1.2	-	-
App	cisco	cyber_vision	3.2.0	-	-
App	cisco	cyber_vision	3.2.1	-	-
App	cisco	cyber_vision	3.2.2	-	-
App	cisco	cyber_vision	3.2.3	-	-
App	cisco	cyber_vision	3.2.4	-	-
App	cisco	cyber_vision	4.0.0	-	-
App	cisco	cyber_vision	4.0.1	-	-
App	cisco	cyber_vision	4.0.2	-	-
App	cisco	cyber_vision	4.0.3	-	-
App	cisco	cyber_vision	4.1.0	-	-
App	cisco	cyber_vision	4.1.1	-	-
App	cisco	cyber_vision	4.1.2	-	-
App	cisco	cyber_vision	4.1.3	-	-
App	cisco	cyber_vision	4.1.4	-	-
App	cisco	cyber_vision	4.1.5	-	-
App	cisco	cyber_vision	4.1.6	-	-
App	cisco	cyber_vision	4.1.7	-	-
App	cisco	cyber_vision	4.2.0	-	-
App	cisco	cyber_vision	4.2.1	-	-
App	cisco	cyber_vision	4.2.2	-	-
App	cisco	cyber_vision	4.2.3	-	-
App	cisco	cyber_vision	4.2.4	-	-
App	cisco	cyber_vision	4.2.6	-	-
App	cisco	cyber_vision	4.3.0	-	-
App	cisco	cyber_vision	4.3.1	-	-
App	cisco	cyber_vision	4.3.2	-	-
App	cisco	cyber_vision	4.3.3	-	-
App	cisco	cyber_vision	4.4.0	-	-
App	cisco	cyber_vision	4.4.1	-	-
App	cisco	cyber_vision	4.4.2	-	-
App	cisco	cyber_vision	4.4.3	-	-
App	cisco	cyber_vision	5.0.0	-	-
App	cisco	cyber_vision	5.0.1	-	-
App	cisco	cyber_vision	5.0.2	-	-
App	cisco	cyber_vision	5.1.0	-	-
App	cisco	cyber_vision	5.1.1	-	-
App	cisco	cyber_vision	5.1.2	-	-
App	cisco	cyber_vision	5.1.3	-	-
App	cisco	cyber_vision	5.2.0	-	-
App	cisco	cyber_vision	5.2.1	-	-
App	cisco	cyber_vision	5.3.0	-	-
App	cisco	cyber_vision	5.3.1	-	-
App	cisco	cyber_vision	5.3.2	-	-
App	cisco	secure_firewall_threat_defense	7.0.0	-	-
App	cisco	secure_firewall_threat_defense	7.0.0.1	-	-
App	cisco	secure_firewall_threat_defense	7.0.1	-	-
App	cisco	secure_firewall_threat_defense	7.0.1.1	-	-
App	cisco	secure_firewall_threat_defense	7.0.2	-	-
App	cisco	secure_firewall_threat_defense	7.0.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.0.3	-	-
App	cisco	secure_firewall_threat_defense	7.0.4	-	-
App	cisco	secure_firewall_threat_defense	7.0.5	-	-
App	cisco	secure_firewall_threat_defense	7.0.6	-	-
App	cisco	secure_firewall_threat_defense	7.0.6.1	-	-
App	cisco	secure_firewall_threat_defense	7.0.6.2	-	-
App	cisco	secure_firewall_threat_defense	7.0.6.3	-	-
App	cisco	secure_firewall_threat_defense	7.0.7	-	-
App	cisco	secure_firewall_threat_defense	7.0.8	-	-
App	cisco	secure_firewall_threat_defense	7.0.8.1	-	-
App	cisco	secure_firewall_threat_defense	7.1.0	-	-
App	cisco	secure_firewall_threat_defense	7.1.0.1	-	-
App	cisco	secure_firewall_threat_defense	7.1.0.2	-	-
App	cisco	secure_firewall_threat_defense	7.1.0.3	-	-
App	cisco	secure_firewall_threat_defense	7.2.0	-	-
App	cisco	secure_firewall_threat_defense	7.2.0.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.10	-	-
App	cisco	secure_firewall_threat_defense	7.2.10.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.3	-	-
App	cisco	secure_firewall_threat_defense	7.2.4	-	-
App	cisco	secure_firewall_threat_defense	7.2.4.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.5	-	-
App	cisco	secure_firewall_threat_defense	7.2.5.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.5.2	-	-
App	cisco	secure_firewall_threat_defense	7.2.6	-	-
App	cisco	secure_firewall_threat_defense	7.2.7	-	-
App	cisco	secure_firewall_threat_defense	7.2.8	-	-
App	cisco	secure_firewall_threat_defense	7.2.8.1	-	-
App	cisco	secure_firewall_threat_defense	7.2.9	-	-
App	cisco	secure_firewall_threat_defense	7.3.0	-	-
App	cisco	secure_firewall_threat_defense	7.3.1	-	-
App	cisco	secure_firewall_threat_defense	7.3.1.1	-	-
App	cisco	secure_firewall_threat_defense	7.3.1.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.0	-	-
App	cisco	secure_firewall_threat_defense	7.4.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.1.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.2	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.3	-	-
App	cisco	secure_firewall_threat_defense	7.4.2.4	-	-
App	cisco	secure_firewall_threat_defense	7.4.3	-	-
App	cisco	secure_firewall_threat_defense	7.6.0	-	-
App	cisco	secure_firewall_threat_defense	7.6.1	-	-
App	cisco	secure_firewall_threat_defense	7.6.2	-	-
App	cisco	secure_firewall_threat_defense	7.6.2.1	-	-
App	cisco	secure_firewall_threat_defense	7.7.0	-	-
App	cisco	secure_firewall_threat_defense	7.7.10	-	-
App	cisco	secure_firewall_threat_defense	7.7.10.1	-	-
App	cisco	snort	-	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.10.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.11.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.3	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.3a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.4	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.4a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.4b	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.5	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.5a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.5b	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.5c	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.5d	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.12.6	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.13.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.14.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.2a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.2c	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.3	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.3a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.4	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.15.4c	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.16.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.17.1	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.18.1	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.18.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.18.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.2.1r	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.3	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.4	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.4a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.5	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.6	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.7	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.8	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.3.8a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.4.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.4.1b	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.4.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.5.1	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.5.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.3	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.3a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.4	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.5	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.6	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.6a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.7	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.8	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.6.8a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.7.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.7.2	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.8.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.1a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.2a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.3a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.4	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.4a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.5a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.5e	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.5f	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.6	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.7a	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.7b	-	-
OS	cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	17.9.8	-	-

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