VulnSocial

CVE-2026-20057Disclosure(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 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.    This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 a denial of service (DoS) condition.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-369

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 2 signals
  • 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

116 versions affected across 4 products

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-03-04: 2Technical Details · 2026-03-04: 203-04
Signal classification1 categories
Disclosure
2100.0%
Referenced assets3 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-20057 Unauthenticated Snort 3 VBA Decompression Vulnerability Causing DoS Cond... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-20057 Vulnerability Notification: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=3

    Post summary

    The tweet announces CVE-2026-20057, describing a new unauthenticated Snort 3 VBA decompression vulnerability that can lead to denial‑of‑service, but provides no PoC, exploit, or patch information.

    0000045
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-20057 Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attack… https://www.cve.org/CVERecord?id=CVE-2026-20057

    Post summary

    A vulnerability enabling unauthenticated remote attacks via Snort 3's VBA feature has been disclosed, affecting multiple Cisco products. No PoC, exploit, patch, or active exploitation details are provided.

    0000095
    56.6K followersView on X
CPE platform detail117 entries

117 of 117 entries

PartVendorProductVersionTarget SWTarget HW
Appciscocyber_vision3.0.0--
Appciscocyber_vision3.0.1--
Appciscocyber_vision3.0.2--
Appciscocyber_vision3.0.3--
Appciscocyber_vision3.0.4--
Appciscocyber_vision3.0.5--
Appciscocyber_vision3.0.6--
Appciscocyber_vision3.1.0--
Appciscocyber_vision3.1.1--
Appciscocyber_vision3.1.2--
Appciscocyber_vision3.2.0--
Appciscocyber_vision3.2.1--
Appciscocyber_vision3.2.2--
Appciscocyber_vision3.2.3--
Appciscocyber_vision3.2.4--
Appciscocyber_vision4.0.0--
Appciscocyber_vision4.0.1--
Appciscocyber_vision4.0.2--
Appciscocyber_vision4.0.3--
Appciscocyber_vision4.1.0--
Appciscocyber_vision4.1.1--
Appciscocyber_vision4.1.2--
Appciscocyber_vision4.1.3--
Appciscocyber_vision4.1.4--
Appciscocyber_vision4.1.5--
Appciscocyber_vision4.1.6--
Appciscocyber_vision4.1.7--
Appciscocyber_vision4.2.0--
Appciscocyber_vision4.2.1--
Appciscocyber_vision4.2.2--
Appciscocyber_vision4.2.3--
Appciscocyber_vision4.2.4--
Appciscocyber_vision4.2.6--
Appciscocyber_vision4.3.0--
Appciscocyber_vision4.3.1--
Appciscocyber_vision4.3.2--
Appciscocyber_vision4.3.3--
Appciscocyber_vision4.4.0--
Appciscocyber_vision4.4.1--
Appciscocyber_vision4.4.2--
Appciscocyber_vision4.4.3--
Appciscocyber_vision5.0.0--
Appciscocyber_vision5.0.1--
Appciscocyber_vision5.0.2--
Appciscocyber_vision5.1.0--
Appciscocyber_vision5.1.1--
Appciscocyber_vision5.1.2--
Appciscocyber_vision5.1.3--
Appciscocyber_vision5.2.0--
Appciscocyber_vision5.2.1--
Appciscocyber_vision5.3.0--
Appciscocyber_vision5.3.1--
Appciscosecure_firewall_threat_defense7.2.0--
Appciscosecure_firewall_threat_defense7.2.0.1--
Appciscosecure_firewall_threat_defense7.2.1--
Appciscosecure_firewall_threat_defense7.2.10--
Appciscosecure_firewall_threat_defense7.2.10.2--
Appciscosecure_firewall_threat_defense7.2.2--
Appciscosecure_firewall_threat_defense7.2.3--
Appciscosecure_firewall_threat_defense7.2.4--
Appciscosecure_firewall_threat_defense7.2.4.1--
Appciscosecure_firewall_threat_defense7.2.5--
Appciscosecure_firewall_threat_defense7.2.5.1--
Appciscosecure_firewall_threat_defense7.2.5.2--
Appciscosecure_firewall_threat_defense7.2.6--
Appciscosecure_firewall_threat_defense7.2.7--
Appciscosecure_firewall_threat_defense7.2.8--
Appciscosecure_firewall_threat_defense7.2.8.1--
Appciscosecure_firewall_threat_defense7.2.9--
Appciscosecure_firewall_threat_defense7.3.0--
Appciscosecure_firewall_threat_defense7.3.1--
Appciscosecure_firewall_threat_defense7.3.1.1--
Appciscosecure_firewall_threat_defense7.3.1.2--
Appciscosecure_firewall_threat_defense7.4.0--
Appciscosecure_firewall_threat_defense7.4.1--
Appciscosecure_firewall_threat_defense7.4.1.1--
Appciscosecure_firewall_threat_defense7.4.2--
Appciscosecure_firewall_threat_defense7.4.2.1--
Appciscosecure_firewall_threat_defense7.4.2.2--
Appciscosecure_firewall_threat_defense7.4.2.3--
Appciscosecure_firewall_threat_defense7.4.2.4--
Appciscosecure_firewall_threat_defense7.4.3--
Appciscosecure_firewall_threat_defense7.6.0--
Appciscosecure_firewall_threat_defense7.6.1--
Appciscosecure_firewall_threat_defense7.6.2--
Appciscosecure_firewall_threat_defense7.6.2.1--
Appciscosecure_firewall_threat_defense7.7.0--
Appciscosecure_firewall_threat_defense7.7.10--
Appciscosecure_firewall_threat_defense7.7.10.1--
Appciscosnort---
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.2--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.3--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.3a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.4--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.4a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.4b--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.5--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.5a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.5b--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.5c--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.5d--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.12.6--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.13.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.14.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.2a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.2c--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.3--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.3a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.4--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.15.4c--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.16.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.17.1--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.18.1--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.18.1a--
OSciscounified_threat_defense_snort_intrusion_prevention_system_engine17.18.2--

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