Threats / Cisco / CVE-2025-20362
CVE-2025-20362
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-19
Cisco Secure Firewall Adaptive Security Appliance and Threat vulnerability
Missing authorization in Cisco Secure Firewall ASA and FTD VPN Web Server allows unauthorized access to protected resources. Exploited in the wild.
Verdict
Today item — known-exploited.
An attacker can bypass authorization controls on the VPN Web Server to access restricted functionality without proper credentials, potentially chaining with other vulnerabilities for deeper compromise.
CISA KEV Yes · 2025-09-255EPSS 0.87085 (verify live)6CVSS 6.53CISA SSVC Exploitation: active · Automatable: yes · Impact: partial4Exploit Public PoC / detection · nuclei template17
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
134 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-09-25).
Probability (EPSS)
EPSS 0.87085 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) · Affected: Cisco, Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.1, set at disclosure.
Weakness (CWE)
Mapped to CWE-862 Missing Authorization — weakness family: Authorization / access control.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog the same day the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a public proof-of-concept / detection template). Catalog entries: nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the VPN Web Server endpoint and probe for missing authorization checks on sensitive operations.
Business
Perimeter security is compromised, enabling unauthorized remote access attempts to protected network resources.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute privileged actions or access restricted data by bypassing the authorization mechanism without valid credentials.
Business
Confidential VPN configuration, user credentials, or traffic data may be exposed to unauthenticated attackers.
3
Lateral reach — past segmentation narrative 3
Attacker
I chain this vulnerability with CVE-2025-20333 to escalate access or achieve remote code execution on the firewall.
Business
Complete firewall compromise enables lateral movement into the protected network and potential data exfiltration.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by ciscoCNA
Credited with finding itNo finder is named in the public CVE record or the scanned vendor advisory — attribution scoped to the sources checked.
Found an error? Propose a correction.
A correction is a cited counter-claim — it must cite a source,
gets reviewed by a second human, and is never auto-applied. See the
correction convention and our identity
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