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CVE-2026-20053

Vulnerability in Cisco Snort

CVSS score

5.8

EPSS probability

%0.4

Risk score

0.0

Published

7 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability 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-2026-20053 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 range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause a DoS condition.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20053 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ciscosnort View
2ciscocyber vision View
3ciscocyber vision View
4ciscocyber vision View
5ciscocyber vision View
6ciscocyber vision View
7ciscocyber vision View
8ciscocyber vision View
9ciscocyber vision View
10ciscocyber vision View
11ciscocyber vision View
12ciscocyber vision View
13ciscocyber vision View
14ciscocyber vision View
15ciscocyber vision View
16ciscocyber vision View
17ciscocyber vision View
18ciscocyber vision View
19ciscocyber vision View
20ciscocyber vision View
21ciscocyber vision View
22ciscocyber vision View
23ciscocyber vision View
24ciscocyber vision View
25ciscocyber vision View
26ciscocyber vision View
27ciscocyber vision View
28ciscocyber vision View
29ciscocyber vision View
30ciscocyber vision View
31ciscocyber vision View
32ciscocyber vision View
33ciscocyber vision View
34ciscocyber vision View
35ciscocyber vision View
36ciscocyber vision View
37ciscocyber vision View
38ciscocyber vision View
39ciscocyber vision View
40ciscocyber vision View
41ciscocyber vision View
42ciscocyber vision View
43ciscocyber vision View
44ciscocyber vision View
45ciscocyber vision View
46ciscocyber vision View
47ciscocyber vision View
48ciscocyber vision View
49ciscocyber vision View
50ciscocyber vision View
51ciscocyber vision View
52ciscocyber vision View
53ciscocyber vision View
54ciscocyber vision View
55ciscosecure firewall threat defense View
56ciscosecure firewall threat defense View
57ciscosecure firewall threat defense View
58ciscosecure firewall threat defense View
59ciscosecure firewall threat defense View
60ciscosecure firewall threat defense View
61ciscosecure firewall threat defense View
62ciscosecure firewall threat defense View
63ciscosecure firewall threat defense View
64ciscosecure firewall threat defense View
65ciscosecure firewall threat defense View
66ciscosecure firewall threat defense View
67ciscosecure firewall threat defense View
68ciscosecure firewall threat defense View
69ciscosecure firewall threat defense View
70ciscosecure firewall threat defense View
71ciscosecure firewall threat defense View
72ciscosecure firewall threat defense View
73ciscosecure firewall threat defense View
74ciscosecure firewall threat defense View
75ciscosecure firewall threat defense View
76ciscosecure firewall threat defense View
77ciscosecure firewall threat defense View
78ciscosecure firewall threat defense View
79ciscosecure firewall threat defense View
80ciscosecure firewall threat defense View
81ciscosecure firewall threat defense View
82ciscosecure firewall threat defense View
83ciscosecure firewall threat defense View
84ciscosecure firewall threat defense View
85ciscosecure firewall threat defense View
86ciscosecure firewall threat defense View
87ciscosecure firewall threat defense View
88ciscosecure firewall threat defense View
89ciscosecure firewall threat defense View
90ciscosecure firewall threat defense View
91ciscosecure firewall threat defense View
92ciscounified threat defense snort intrusion prevention system engine View
93ciscounified threat defense snort intrusion prevention system engine View
94ciscounified threat defense snort intrusion prevention system engine View
95ciscounified threat defense snort intrusion prevention system engine View
96ciscounified threat defense snort intrusion prevention system engine View
97ciscounified threat defense snort intrusion prevention system engine View
98ciscounified threat defense snort intrusion prevention system engine View
99ciscounified threat defense snort intrusion prevention system engine View
100ciscounified threat defense snort intrusion prevention system engine View
101ciscounified threat defense snort intrusion prevention system engine View
102ciscounified threat defense snort intrusion prevention system engine View
103ciscounified threat defense snort intrusion prevention system engine View
104ciscounified threat defense snort intrusion prevention system engine View
105ciscounified threat defense snort intrusion prevention system engine View
106ciscounified threat defense snort intrusion prevention system engine View
107ciscounified threat defense snort intrusion prevention system engine View
108ciscounified threat defense snort intrusion prevention system engine View
109ciscounified threat defense snort intrusion prevention system engine View
110ciscounified threat defense snort intrusion prevention system engine View
111ciscounified threat defense snort intrusion prevention system engine View
112ciscounified threat defense snort intrusion prevention system engine View
113ciscounified threat defense snort intrusion prevention system engine View
114ciscounified threat defense snort intrusion prevention system engine View
115ciscounified threat defense snort intrusion prevention system engine View
116ciscounified threat defense snort intrusion prevention system engine View
117ciscounified threat defense snort intrusion prevention system engine View
118ciscounified threat defense snort intrusion prevention system engine View
119ciscounified threat defense snort intrusion prevention system engine View
120ciscounified threat defense snort intrusion prevention system engine View
Total affected vendors: 1|Products: 120

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.

SCOREVERSIONSEVERITYVECTORSOURCE
5.8CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:LNVD

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-2026-20053 is associated with the following CWEs:

CWE-122: Common Weakness Enumeration Entry CWE-122

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-2026-20053 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-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
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

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

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Weakness Type (CWE & CAPEC)

CWE-122

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