CVE-2025-20333

Katalog CVE

CVSS 9.9 · Critical KEV · sudah dieksploitasi EPSS 70,7%

Kerentanan Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') pada cisco adaptive security appliance software, cisco secure firewall threat defense. Skor CVSS 3.1 9.9 (Critical) menurut cisco.com. Masuk katalog KEV CISA pada 25 September 2025, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.

Rincian

Terbit di NVD

25 September 2025

Terakhir diubah

11 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

9.9 (Critical), sumber cisco.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

EPSS (30 hari)

70,7% peluang dieksploitasi; lebih tinggi dari 99,3% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability

Masuk KEV

25 September 2025

Tenggat CISA

26 September 2025 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-z5xP8EUB advisory vendor
• https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20333 pemerintah AS