CVE-2026-20058

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-2026-20058 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 vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities 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 unexpectedly restart, causing a DoS condition.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20058 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	cisco	snort	View
2	cisco	secure firewall threat defense	View
3	cisco	secure firewall threat defense	View
4	cisco	secure firewall threat defense	View
5	cisco	secure firewall threat defense	View
6	cisco	secure firewall threat defense	View
7	cisco	secure firewall threat defense	View
8	cisco	secure firewall threat defense	View
9	cisco	secure firewall threat defense	View
10	cisco	secure firewall threat defense	View
11	cisco	secure firewall threat defense	View
12	cisco	secure firewall threat defense	View
13	cisco	secure firewall threat defense	View
14	cisco	secure firewall threat defense	View
15	cisco	secure firewall threat defense	View
16	cisco	secure firewall threat defense	View
17	cisco	secure firewall threat defense	View
18	cisco	secure firewall threat defense	View
19	cisco	secure firewall threat defense	View
20	cisco	secure firewall threat defense	View
21	cisco	secure firewall threat defense	View
22	cisco	secure firewall threat defense	View
23	cisco	secure firewall threat defense	View
24	cisco	secure firewall threat defense	View
25	cisco	secure firewall threat defense	View
26	cisco	secure firewall threat defense	View
27	cisco	secure firewall threat defense	View
28	cisco	secure firewall threat defense	View
29	cisco	secure firewall threat defense	View
30	cisco	secure firewall threat defense	View
31	cisco	secure firewall threat defense	View
32	cisco	secure firewall threat defense	View
33	cisco	secure firewall threat defense	View
34	cisco	secure firewall threat defense	View
35	cisco	secure firewall threat defense	View
36	cisco	secure firewall threat defense	View
37	cisco	secure firewall threat defense	View
38	cisco	secure firewall threat defense	View
39	cisco	unified threat defense snort intrusion prevention system engine	View
40	cisco	unified threat defense snort intrusion prevention system engine	View
41	cisco	unified threat defense snort intrusion prevention system engine	View
42	cisco	unified threat defense snort intrusion prevention system engine	View
43	cisco	unified threat defense snort intrusion prevention system engine	View
44	cisco	unified threat defense snort intrusion prevention system engine	View
45	cisco	unified threat defense snort intrusion prevention system engine	View
46	cisco	unified threat defense snort intrusion prevention system engine	View
47	cisco	unified threat defense snort intrusion prevention system engine	View
48	cisco	unified threat defense snort intrusion prevention system engine	View
49	cisco	unified threat defense snort intrusion prevention system engine	View
50	cisco	unified threat defense snort intrusion prevention system engine	View
51	cisco	unified threat defense snort intrusion prevention system engine	View
52	cisco	unified threat defense snort intrusion prevention system engine	View
53	cisco	unified threat defense snort intrusion prevention system engine	View
54	cisco	unified threat defense snort intrusion prevention system engine	View
55	cisco	unified threat defense snort intrusion prevention system engine	View
56	cisco	unified threat defense snort intrusion prevention system engine	View
57	cisco	unified threat defense snort intrusion prevention system engine	View
58	cisco	unified threat defense snort intrusion prevention system engine	View
59	cisco	unified threat defense snort intrusion prevention system engine	View
60	cisco	unified threat defense snort intrusion prevention system engine	View
61	cisco	unified threat defense snort intrusion prevention system engine	View
62	cisco	unified threat defense snort intrusion prevention system engine	View
63	cisco	unified threat defense snort intrusion prevention system engine	View
64	cisco	unified threat defense snort intrusion prevention system engine	View
65	cisco	unified threat defense snort intrusion prevention system engine	View
66	cisco	unified threat defense snort intrusion prevention system engine	View
67	cisco	unified threat defense snort intrusion prevention system engine	View
68	cisco	unified threat defense snort intrusion prevention system engine	View

Total affected vendors: 1|Products: 68

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-2026-20058 is associated with the following CWEs:

CWE-786: Common Weakness Enumeration Entry CWE-786

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-2026-20058 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-786

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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.

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