CVE-2026-20054

Vulnerability in Cisco Snort

CVSS score

5.8

EPSS probability

%0.4

Risk score

0.0

Published

7 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-20054 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.  This vulnerability is due to improper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to enter an infinite loop, causing a DoS condition.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20054 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	cisco	snort	View
2	cisco	cyber vision	View
3	cisco	cyber vision	View
4	cisco	cyber vision	View
5	cisco	cyber vision	View
6	cisco	cyber vision	View
7	cisco	cyber vision	View
8	cisco	cyber vision	View
9	cisco	cyber vision	View
10	cisco	cyber vision	View
11	cisco	cyber vision	View
12	cisco	cyber vision	View
13	cisco	cyber vision	View
14	cisco	cyber vision	View
15	cisco	cyber vision	View
16	cisco	cyber vision	View
17	cisco	cyber vision	View
18	cisco	cyber vision	View
19	cisco	cyber vision	View
20	cisco	cyber vision	View
21	cisco	cyber vision	View
22	cisco	cyber vision	View
23	cisco	cyber vision	View
24	cisco	cyber vision	View
25	cisco	cyber vision	View
26	cisco	cyber vision	View
27	cisco	cyber vision	View
28	cisco	cyber vision	View
29	cisco	cyber vision	View
30	cisco	cyber vision	View
31	cisco	cyber vision	View
32	cisco	cyber vision	View
33	cisco	cyber vision	View
34	cisco	cyber vision	View
35	cisco	cyber vision	View
36	cisco	cyber vision	View
37	cisco	cyber vision	View
38	cisco	cyber vision	View
39	cisco	cyber vision	View
40	cisco	cyber vision	View
41	cisco	cyber vision	View
42	cisco	cyber vision	View
43	cisco	cyber vision	View
44	cisco	cyber vision	View
45	cisco	cyber vision	View
46	cisco	cyber vision	View
47	cisco	cyber vision	View
48	cisco	cyber vision	View
49	cisco	cyber vision	View
50	cisco	cyber vision	View
51	cisco	cyber vision	View
52	cisco	cyber vision	View
53	cisco	cyber vision	View
54	cisco	cyber vision	View
55	cisco	secure firewall threat defense	View
56	cisco	secure firewall threat defense	View
57	cisco	secure firewall threat defense	View
58	cisco	secure firewall threat defense	View
59	cisco	secure firewall threat defense	View
60	cisco	secure firewall threat defense	View
61	cisco	secure firewall threat defense	View
62	cisco	secure firewall threat defense	View
63	cisco	secure firewall threat defense	View
64	cisco	secure firewall threat defense	View
65	cisco	secure firewall threat defense	View
66	cisco	secure firewall threat defense	View
67	cisco	secure firewall threat defense	View
68	cisco	secure firewall threat defense	View
69	cisco	secure firewall threat defense	View
70	cisco	secure firewall threat defense	View
71	cisco	secure firewall threat defense	View
72	cisco	secure firewall threat defense	View
73	cisco	secure firewall threat defense	View
74	cisco	secure firewall threat defense	View
75	cisco	secure firewall threat defense	View
76	cisco	secure firewall threat defense	View
77	cisco	secure firewall threat defense	View
78	cisco	secure firewall threat defense	View
79	cisco	secure firewall threat defense	View
80	cisco	secure firewall threat defense	View
81	cisco	secure firewall threat defense	View
82	cisco	secure firewall threat defense	View
83	cisco	secure firewall threat defense	View
84	cisco	secure firewall threat defense	View
85	cisco	secure firewall threat defense	View
86	cisco	secure firewall threat defense	View
87	cisco	secure firewall threat defense	View
88	cisco	secure firewall threat defense	View
89	cisco	secure firewall threat defense	View
90	cisco	secure firewall threat defense	View
91	cisco	secure firewall threat defense	View
92	cisco	unified threat defense snort intrusion prevention system engine	View
93	cisco	unified threat defense snort intrusion prevention system engine	View
94	cisco	unified threat defense snort intrusion prevention system engine	View
95	cisco	unified threat defense snort intrusion prevention system engine	View
96	cisco	unified threat defense snort intrusion prevention system engine	View
97	cisco	unified threat defense snort intrusion prevention system engine	View
98	cisco	unified threat defense snort intrusion prevention system engine	View
99	cisco	unified threat defense snort intrusion prevention system engine	View
100	cisco	unified threat defense snort intrusion prevention system engine	View
101	cisco	unified threat defense snort intrusion prevention system engine	View
102	cisco	unified threat defense snort intrusion prevention system engine	View
103	cisco	unified threat defense snort intrusion prevention system engine	View
104	cisco	unified threat defense snort intrusion prevention system engine	View
105	cisco	unified threat defense snort intrusion prevention system engine	View
106	cisco	unified threat defense snort intrusion prevention system engine	View
107	cisco	unified threat defense snort intrusion prevention system engine	View
108	cisco	unified threat defense snort intrusion prevention system engine	View
109	cisco	unified threat defense snort intrusion prevention system engine	View
110	cisco	unified threat defense snort intrusion prevention system engine	View
111	cisco	unified threat defense snort intrusion prevention system engine	View
112	cisco	unified threat defense snort intrusion prevention system engine	View
113	cisco	unified threat defense snort intrusion prevention system engine	View
114	cisco	unified threat defense snort intrusion prevention system engine	View
115	cisco	unified threat defense snort intrusion prevention system engine	View
116	cisco	unified threat defense snort intrusion prevention system engine	View
117	cisco	unified threat defense snort intrusion prevention system engine	View
118	cisco	unified threat defense snort intrusion prevention system engine	View
119	cisco	unified threat defense snort intrusion prevention system engine	View
120	cisco	unified threat defense snort intrusion prevention system engine	View
121	cisco	unified threat defense snort intrusion prevention system engine	View
122	cisco	unified threat defense snort intrusion prevention system engine	View
123	cisco	unified threat defense snort intrusion prevention system engine	View
124	cisco	unified threat defense snort intrusion prevention system engine	View
125	cisco	unified threat defense snort intrusion prevention system engine	View
126	cisco	unified threat defense snort intrusion prevention system engine	View
127	cisco	unified threat defense snort intrusion prevention system engine	View
128	cisco	unified threat defense snort intrusion prevention system engine	View
129	cisco	unified threat defense snort intrusion prevention system engine	View
130	cisco	unified threat defense snort intrusion prevention system engine	View
131	cisco	unified threat defense snort intrusion prevention system engine	View
132	cisco	unified threat defense snort intrusion prevention system engine	View
133	cisco	unified threat defense snort intrusion prevention system engine	View
134	cisco	unified threat defense snort intrusion prevention system engine	View
135	cisco	unified threat defense snort intrusion prevention system engine	View
136	cisco	unified threat defense snort intrusion prevention system engine	View
137	cisco	unified threat defense snort intrusion prevention system engine	View
138	cisco	unified threat defense snort intrusion prevention system engine	View
139	cisco	unified threat defense snort intrusion prevention system engine	View
140	cisco	unified threat defense snort intrusion prevention system engine	View
141	cisco	unified threat defense snort intrusion prevention system engine	View
142	cisco	unified threat defense snort intrusion prevention system engine	View
143	cisco	unified threat defense snort intrusion prevention system engine	View
144	cisco	unified threat defense snort intrusion prevention system engine	View
145	cisco	unified threat defense snort intrusion prevention system engine	View
146	cisco	unified threat defense snort intrusion prevention system engine	View
147	cisco	unified threat defense snort intrusion prevention system engine	View
148	cisco	unified threat defense snort intrusion prevention system engine	View
149	cisco	unified threat defense snort intrusion prevention system engine	View
150	cisco	unified threat defense snort intrusion prevention system engine	View
151	cisco	unified threat defense snort intrusion prevention system engine	View
152	cisco	unified threat defense snort intrusion prevention system engine	View
153	cisco	unified threat defense snort intrusion prevention system engine	View
154	cisco	unified threat defense snort intrusion prevention system engine	View
155	cisco	unified threat defense snort intrusion prevention system engine	View
156	cisco	unified threat defense snort intrusion prevention system engine	View
157	cisco	unified threat defense snort intrusion prevention system engine	View
158	cisco	unified threat defense snort intrusion prevention system engine	View
159	cisco	unified threat defense snort intrusion prevention system engine	View
160	cisco	unified threat defense snort intrusion prevention system engine	View
161	cisco	unified threat defense snort intrusion prevention system engine	View
162	cisco	unified threat defense snort intrusion prevention system engine	View
163	cisco	unified threat defense snort intrusion prevention system engine	View
164	cisco	unified threat defense snort intrusion prevention system engine	View
165	cisco	unified threat defense snort intrusion prevention system engine	View
166	cisco	unified threat defense snort intrusion prevention system engine	View
167	cisco	unified threat defense snort intrusion prevention system engine	View
168	cisco	unified threat defense snort intrusion prevention system engine	View
169	cisco	unified threat defense snort intrusion prevention system engine	View
170	cisco	unified threat defense snort intrusion prevention system engine	View
171	cisco	unified threat defense snort intrusion prevention system engine	View
172	cisco	unified threat defense snort intrusion prevention system engine	View
173	cisco	unified threat defense snort intrusion prevention system engine	View
174	cisco	unified threat defense snort intrusion prevention system engine	View
175	cisco	unified threat defense snort intrusion prevention system engine	View
176	cisco	unified threat defense snort intrusion prevention system engine	View
177	cisco	unified threat defense snort intrusion prevention system engine	View
178	cisco	unified threat defense snort intrusion prevention system engine	View
179	cisco	unified threat defense snort intrusion prevention system engine	View
180	cisco	unified threat defense snort intrusion prevention system engine	View
181	cisco	unified threat defense snort intrusion prevention system engine	View
182	cisco	unified threat defense snort intrusion prevention system engine	View
183	cisco	unified threat defense snort intrusion prevention system engine	View
184	cisco	unified threat defense snort intrusion prevention system engine	View
185	cisco	unified threat defense snort intrusion prevention system engine	View
186	cisco	unified threat defense snort intrusion prevention system engine	View
187	cisco	unified threat defense snort intrusion prevention system engine	View
188	cisco	unified threat defense snort intrusion prevention system engine	View
189	cisco	unified threat defense snort intrusion prevention system engine	View
190	cisco	unified threat defense snort intrusion prevention system engine	View
191	cisco	unified threat defense snort intrusion prevention system engine	View
192	cisco	unified threat defense snort intrusion prevention system engine	View
193	cisco	unified threat defense snort intrusion prevention system engine	View
194	cisco	unified threat defense snort intrusion prevention system engine	View

Total affected vendors: 1|Products: 194

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.8	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20054 is associated with the following CWEs:

CWE-835: Common Weakness Enumeration Entry CWE-835

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20054 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVedvendor-advisory

CVSS Vector Radar Chart

5.8 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

cisco

Weakness Type (CWE & CAPEC)

CWE-835

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Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-20054"