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CVE-2026-20005

Vulnerability in Cisco Snort

CVSS score

5.8

EPSS probability

%0.5

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-2026-20005 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 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 parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20005 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ciscocyber vision View
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54ciscosecure firewall threat defense View
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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
61ciscounified threat defense snort intrusion prevention system engine View
62ciscounified threat defense snort intrusion prevention system engine View
63ciscounified threat defense snort intrusion prevention system engine View
64ciscounified threat defense snort intrusion prevention system engine View
65ciscounified threat defense snort intrusion prevention system engine View
66ciscounified threat defense snort intrusion prevention system engine View
67ciscounified threat defense snort intrusion prevention system engine View
68ciscounified threat defense snort intrusion prevention system engine View
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71ciscounified threat defense snort intrusion prevention system engine View
72ciscounified threat defense snort intrusion prevention system engine View
73ciscounified threat defense snort intrusion prevention system engine View
74ciscounified threat defense snort intrusion prevention system engine View
75ciscounified threat defense snort intrusion prevention system engine View
76ciscounified threat defense snort intrusion prevention system engine View
77ciscounified threat defense snort intrusion prevention system engine View
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81ciscounified threat defense snort intrusion prevention system engine View
82ciscounified threat defense snort intrusion prevention system engine View
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84ciscounified threat defense snort intrusion prevention system engine View
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89ciscounified threat defense snort intrusion prevention system engine View
90ciscosnort View
91ciscomeraki mx100 View
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104ciscomeraki mx68 View
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109ciscomeraki mx95 View
Total affected vendors: 1|Products: 109

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-2026-20005 is associated with the following CWEs:

CWE-392: Common Weakness Enumeration Entry CWE-392

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-2026-20005 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-snort3-multi-dos-XFWkWSwzvendor-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

C
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Weakness Type (CWE & CAPEC)

CWE-392

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CVE-2026-20005 · Vulnerability in Cisco Snort · DayBreach