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The vulnerability in the TLS processing function of Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) for the Firepower 3100 Series and Firepower 4200 Series devices allows a attacker to induce a service failure.

🗓️ 27 Aug 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 1 Views

The vulnerability of the TLS processing function in Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) for the Firepower 3100 Series and Firepower 4200 Series devices is related to improper cleaning or release of reso...

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2025-20127
15 Aug 202511:00
–circl
Cisco		Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Firepower 3100 and 4200 Series TLS 1.3 Cipher Denial of Service Vulnerability
14 Aug 202516:00
–cisco
CNNVD		Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 安全漏洞
14 Aug 202500:00
–cnnvd
CVE		CVE-2025-20127
14 Aug 202516:28
–cve
Cvelist		CVE-2025-20127 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software for Firepower 3100 and 4200 Series TLS Cipher Denial of Service Vulnerability
14 Aug 202516:28
–cvelist
EUVD		EUVD-2025-24854
3 Oct 202520:07
–euvd
NCSC		Vulnerabilities fixed in Cisco Secure Firewall Software
15 Aug 202508:52
–ncsc
NVD		CVE-2025-20127
14 Aug 202517:15
–nvd
OSV		CVE-2025-20127
14 Aug 202517:15
–osv
Positive Technologies		PT-2025-33311
14 Aug 202500:00
–ptsecurity
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27 Aug 2025 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 26.8
CVSS 37.7
EPSS0.00577
1