A vulnerability in the system rate-limiting process for syslog message 419002 of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software… (CVE-2026-20154)
CVE-2026-20154 is a high-severity vulnerability in Cisco Secure Firewall ASA and FTD software related to improper rate limiting of syslog message 419002. An unauthenticated remote attacker can exploit this by sending a flood of TCP SYN packets, causing high CPU utilization and resulting in a denial of service (DoS) condition. There is no information on affected versions or available patches.
AI Analysis
Technical Summary
This vulnerability arises from improper rate limiting in the system process handling syslog message 419002 in Cisco Secure Firewall ASA and FTD software. Exploitation involves an unauthenticated remote attacker sending a flood of TCP SYN packets to the device, which triggers excessive CPU usage and degrades performance, potentially causing a denial of service. The CVSS 3.1 score is 8.6 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation leads to high CPU utilization on affected Cisco Secure Firewall ASA and FTD devices, causing performance degradation and denial of service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
A vulnerability in the system rate-limiting process for syslog message 419002 of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software… (CVE-2026-20154)
Description
CVE-2026-20154 is a high-severity vulnerability in Cisco Secure Firewall ASA and FTD software related to improper rate limiting of syslog message 419002. An unauthenticated remote attacker can exploit this by sending a flood of TCP SYN packets, causing high CPU utilization and resulting in a denial of service (DoS) condition. There is no information on affected versions or available patches.
CVSS v3.1
Score 8.6high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper rate limiting in the system process handling syslog message 419002 in Cisco Secure Firewall ASA and FTD software. Exploitation involves an unauthenticated remote attacker sending a flood of TCP SYN packets to the device, which triggers excessive CPU usage and degrades performance, potentially causing a denial of service. The CVSS 3.1 score is 8.6 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation leads to high CPU utilization on affected Cisco Secure Firewall ASA and FTD devices, causing performance degradation and denial of service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fcpc-64j2-96jc
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-20154"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aab49a355bf5e2cf5992079
Added to database: 09/17/2026, 02:00:03 UTC
Last enriched: 09/17/2026, 02:39:07 UTC
Last updated: 09/17/2026, 05:41:24 UTC
Views: 2
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