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.
Evidence dossier
CVE-2025-20333
CVE-2025-20333
77.5–92.5Priority evidence range
gen-56ccdaf9Normalized restatement
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.
- State
- PUBLISHED
- Published
- Sep 25, 2025
- Updated
- Feb 26, 2026
- Evidence coverage
- 85%
2026-07-18 · v2026.06.15 · percentile 98.5%
Distinct CVSS assessments remain side by side; none are averaged.
Source comparison
Who said what
ciscooriginal assertion
container
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.
Jul 19, 2026Original evidence ↗
CISA KEVoriginal assertion
observed_exploitation
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
Jul 19, 2026Original evidence ↗
FIRST EPSSoriginal assertion
model_probability
Probability 0.403910000000; percentile 0.984850000000
Jul 19, 2026Original evidence ↗
Applicability
Cited product scope
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) Software
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"version": "9.8.3"}, {"status": "affected", "version": "9.8.3.26"}, {"status": "affected", "version": "9.8.3.29"}, {"status": "affected", "version": "9.8.4"}, {"status": "affected", "version": "9.8.4.3"}, {"status": "affected", "version": "9.8.4.7"}, {"status": "affected", "version": "9.8.4.8"}, {"status": "affected", "version": "9.8.4.10"}, {"status": "affected", "version": "9.8.4.12"}, {"status": "affected", "version": "9.8.4.15"}, {"status": "affected", "version": "9.8.4.17"}, {"status": "affected", "version": "9.8.2.45"}, {"status": "affected", "version": "9.8.4.25"}, {"status": "affected", "version": "9.8.4.20"}, {"status": "affected", "version": "9.8.4.22"}, {"status": "affected", "version": "9.8.4.26"}, {"status": "affected", "version": "9.8.4.29"}, {"status": "affected", "version": "9.8.4.32"}, {"status": "affected", "version": "9.8.4.33"}, {"status": "affected", "version": "9.8.4.34"}, {"status": "affected", "version": "9.8.4.35"}, {"status": "affected", "version": "9.8.4.39"}, {"status": "affected", "version": "9.8.4.40"}, {"status": "affected", "version": "9.8.4.41"}, {"status": "affected", "version": "9.8.4.43"}, {"status": "affected", "version": "9.8.4.44"}, {"status": "affected", "version": "9.8.4.45"}, {"status": "affected", "version": "9.8.4.46"}, {"status": "affected", "version": "9.8.4.48"}, {"status": "affected", "version": "9.12.1"}, {"status": "affected", "version": "9.12.1.2"}, {"status": "affected", "version": "9.12.1.3"}, {"status": "affected", "version": "9.12.2"}, {"status": "affected", "version": "9.12.2.4"}, {"status": "affected", "version": "9.12.2.5"}, {"status": "affected", "version": "9.12.2.9"}, {"status": "affected", "version": "9.12.3"}, {"status": "affected", "version": "9.12.3.2"}, {"status": "affected", "version": "9.12.3.7"}, {"status": "affected", "version": "9.12.4"}, {"status": "affected", "version": "9.12.3.12"}, {"status": "affected", "version": "9.12.3.9"}, {"status": "affected", "version": "9.12.2.1"}, {"status": "affected", "version": "9.12.4.2"}, {"status": "affected", "version": "9.12.4.4"}, {"status": "affected", "version": "9.12.4.7"}, {"status": "affected", "version": "9.12.4.10"}, {"status": "affected", "version": "9.12.4.13"}, {"status": "affected", "version": "9.12.4.8"}, {"status": "affected", "version": "9.12.4.18"}, {"status": "affected", "version": "9.12.4.24"}, {"status": "affected", "version": "9.12.4.26"}, {"status": "affected", "version": "9.12.4.29"}, {"status": "affected", "version": "9.12.4.30"}, {"status": "affected", "version": "9.12.4.35"}, {"status": "affected", "version": "9.12.4.37"}, {"status": "affected", "version": "9.12.4.38"}, {"status": "affected", "version": "9.12.4.39"}, {"status": "affected", "version": "9.12.4.40"}, {"status": "affected", "version": "9.12.4.41"}, {"status": "affected", "version": "9.12.4.47"}, {"status": "affected", "version": "9.12.4.48"}, {"status": "affected", "version": "9.12.4.50"}, {"status": "affected", "version": "9.12.4.52"}, {"status": "affected", "version": "9.12.4.54"}, {"status": "affected", "version": "9.12.4.55"}, {"status": "affected", "version": "9.12.4.56"}, {"status": "affected", "version": "9.12.4.58"}, {"status": "affected", "version": "9.12.4.62"}, {"status": "affected", "version": "9.12.4.65"}, {"status": "affected", "version": "9.12.4.67"}, {"status": "affected", "version": "9.14.1"}, {"status": "affected", "version": "9.14.1.10"}, {"status": "affected", "version": "9.14.1.6"}, {"status": "affected", "version": "9.14.1.15"}, {"status": "affected", "version": "9.14.1.19"}, {"status": "affected", "version": "9.14.1.30"}, {"status": "affected", "version": "9.14.2"}, {"status": "affected", "version": "9.14.2.4"}, {"status": "affected", "version": "9.14.2.8"}, {"status": "affected", "version": "9.14.2.13"}, {"status": "affected", "version": "9.14.2.15"}, {"status": "affected", "version": "9.14.3"}, {"status": "affected", "version": "9.14.3.1"}, {"status": "affected", "version": "9.14.3.9"}, {"status": "affected", "version": "9.14.3.11"}, {"status": "affected", "version": "9.14.3.13"}, {"status": "affected", "version": "9.14.3.18"}, {"status": "affected", "version": "9.14.3.15"}, {"status": "affected", "version": "9.14.4"}, {"status": "affected", "version": "9.14.4.6"}, {"status": "affected", "version": "9.14.4.7"}, {"status": "affected", "version": "9.14.4.12"}, {"status": "affected", "version": "9.14.4.13"}, {"status": "affected", "version": "9.14.4.14"}, {"status": "affected", "version": "9.14.4.15"}, {"status": "affected", "version": "9.14.4.17"}, {"status": "affected", "version": "9.14.4.22"}, {"status": "affected", "version": "9.14.4.23"}, {"status": "affected", "version": "9.14.4.24"}, {"status": "affected", "version": "9.16.1"}, {"status": "affected", "version": "9.16.1.28"}, {"status": "affected", "version": "9.16.2"}, {"status": "affected", "version": "9.16.2.3"}, {"status": "affected", "version": "9.16.2.7"}, {"status": "affected", "version": "9.16.2.11"}, {"status": "affected", "version": "9.16.2.13"}, {"status": "affected", "version": "9.16.2.14"}, {"status": "affected", "version": "9.16.3"}, {"status": "affected", "version": "9.16.3.3"}, {"status": "affected", "version": "9.16.3.14"}, {"status": "affected", "version": "9.16.3.15"}, {"status": "affected", "version": "9.16.3.19"}, {"status": "affected", "version": "9.16.3.23"}, {"status": "affected", "version": "9.16.4"}, {"status": "affected", "version": "9.16.4.9"}, {"status": "affected", "version": "9.16.4.14"}, {"status": "affected", "version": "9.16.4.18"}, {"status": "affected", "version": "9.16.4.19"}, {"status": "affected", "version": "9.16.4.27"}, {"status": "affected", "version": "9.16.4.38"}, {"status": "affected", "version": "9.16.4.39"}, {"status": "affected", "version": "9.16.4.42"}, {"status": "affected", "version": "9.16.4.48"}, {"status": "affected", "version": "9.16.4.55"}, {"status": "affected", "version": "9.16.4.57"}, {"status": "affected", "version": "9.16.4.61"}, {"status": "affected", "version": "9.16.4.62"}, {"status": "affected", "version": "9.16.4.67"}, {"status": "affected", "version": "9.16.4.70"}, {"status": "affected", "version": "9.16.4.71"}, {"status": "affected", "version": "9.16.4.76"}, {"status": "affected", "version": "9.16.4.82"}, {"status": "affected", "version": "9.16.4.84"}, {"status": "affected", "version": "9.17.1"}, {"status": "affected", "version": "9.17.1.7"}, {"status": "affected", "version": "9.17.1.9"}, {"status": "affected", "version": "9.17.1.10"}, {"status": "affected", "version": "9.17.1.11"}, {"status": "affected", "version": "9.17.1.13"}, {"status": "affected", "version": "9.17.1.15"}, {"status": "affected", "version": "9.17.1.20"}, {"status": "affected", "version": "9.17.1.30"}, {"status": "affected", "version": "9.17.1.33"}, {"status": "affected", "version": "9.17.1.39"}, {"status": "affected", "version": "9.18.1"}, {"status": "affected", "version": "9.18.1.3"}, {"status": "affected", "version": "9.18.2"}, {"status": "affected", "version": "9.18.2.5"}, {"status": "affected", "version": "9.18.2.7"}, {"status": "affected", "version": "9.18.2.8"}, {"status": "affected", "version": "9.18.3"}, {"status": "affected", "version": "9.18.3.39"}, {"status": "affected", "version": "9.18.3.46"}, {"status": "affected", "version": "9.18.3.53"}, {"status": "affected", "version": "9.18.3.55"}, {"status": "affected", "version": "9.18.3.56"}, {"status": "affected", "version": "9.18.4"}, {"status": "affected", "version": "9.18.4.5"}, {"status": "affected", "version": "9.18.4.8"}, {"status": "affected", "version": "9.18.4.22"}, {"status": "affected", "version": "9.18.4.24"}, {"status": "affected", "version": "9.18.4.29"}, {"status": "affected", "version": "9.18.4.34"}, {"status": "affected", "version": "9.18.4.40"}, {"status": "affected", "version": "9.19.1"}, {"status": "affected", "version": "9.19.1.5"}, {"status": "affected", "version": "9.19.1.9"}, {"status": "affected", "version": "9.19.1.12"}, {"status": "affected", "version": "9.19.1.18"}, {"status": "affected", "version": "9.19.1.22"}, {"status": "affected", "version": "9.19.1.24"}, {"status": "affected", "version": "9.19.1.27"}, {"status": "affected", "version": "9.19.1.28"}, {"status": "affected", "version": "9.19.1.31"}, {"status": "affected", "version": "9.20.1"}, {"status": "affected", "version": "9.20.1.5"}, {"status": "affected", "version": "9.20.2"}, {"status": "affected", "version": "9.20.2.10"}, {"status": "affected", "version": "9.20.2.21"}, {"status": "affected", "version": "9.20.2.22"}, {"status": "affected", "version": "9.20.3"}, {"status": "affected", "version": "9.20.3.4"}, {"status": "affected", "version": "9.22.1.1"}, {"status": "affected", "version": "9.22.1.2"}]unknownCiscoCisco Secure Firewall Threat Defense (FTD) Software
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cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; start including 7.0.0; end excluding 7.0.8.1supportedUnknown vendorUnknown product
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; start including 7.1.0; end excluding 7.2.9supportedUnknown vendorUnknown product
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; start including 7.3.0; end excluding 7.4.2.4supportedUnknown vendorUnknown product
cpe:2.3:a:cisco:firepower_threat_defense:7.6.0:*:*:*:*:*:*:*supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.12; end excluding 9.12.4.72supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.14; end excluding 9.14.4.28supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.16; end excluding 9.16.4.85supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.17.0; end excluding 9.17.1.45supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.18; end excluding 9.18.4.47supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.19; end excluding 9.19.1.37supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.20; end excluding 9.20.3.7supportedUnknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.22; end excluding 9.22.1.3supportedAssessments
CVSS by origin
psirt@cisco.comCVSS 3.1 · role Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HciscoCVSS 3.1 · role unknown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLimitations and unknowns
- KEV membership is authoritative for the catalog, not proof of exposure in any environment.
- EPSS is a dated model probability and not an individual-environment prediction.
- Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
- NVD-carried upstream facts remain derivative and are not independent corroboration.
- Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
- NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
- Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
- Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.