CVE-2025-20333

At a glance

Severity: CRITICAL 9.9
Exploitation: Known exploited (CISA KEV) · added 2025-09-25
Exploited per ENISA since 2025-09-25
EPSS: EPSS 71.21 % · percentile 99 (2026-10-27)
State: PUBLISHED
Published: 2025-09-25
Updated: 2026-02-26
Assigner: cisco
NVD status: Analyzed

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	cisco
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · psirt@cisco.com (Secondary)

Weaknesses (CWE)

CWE-120

European references

ENISA EUVD · EUVD-2025-31140
GCVE · GCVE-0-2025-20333

CERT-FR advisories

CERTFR-2025-AVI-0819 — Multiples vulnérabilités dans les produits Cisco · cert.ssi.gouv.fr
CERTFR-2025-ALE-013 — [MàJ] Multiples vulnérabilités dans Cisco ASA et FTD · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.12 < 9.12.4.72
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.14 < 9.14.4.28
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.16 < 9.16.4.85
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.17.0 < 9.17.1.45
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.18 < 9.18.4.47
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.19 < 9.19.1.37
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.20 < 9.20.3.7
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* ≥ 9.22 < 9.22.1.3
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.0.0 < 7.0.8.1
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.1.0 < 7.2.9
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.3.0 < 7.4.2.4
cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.0:*:*:*:*:*:*:*

Affected products

Product	Versions
Cisco · Cisco Secure Firewall Adaptive Security Appliance (ASA) Software	affected 9.8.1 ; affected 9.8.1.5 ; affected 9.8.1.7 ; affected 9.8.2 ; affected 9.8.2.8 ; affected 9.8.2.14
Cisco · Cisco Secure Firewall Threat Defense (FTD) Software	affected 6.2.3 ; affected 6.2.3.1 ; affected 6.2.3.2 ; affected 6.2.3.3 ; affected 6.2.3.4 ; affected 6.2.3.5

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD