How severe is CVE-2025-20362?

CVE-2025-20362 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-20362 being actively exploited?

Yes. CVE-2025-20362 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-09-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-20362?

CVE-2025-20362 primarily affects Cisco Adaptive Security Appliance Software. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20362?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-20362 have an EU (EUVD) identifier?

Yes. CVE-2025-20362 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31139. It is also flagged as exploited in the EUVD (since 2025-09-25).

When was CVE-2025-20362 published?

CVE-2025-20362 was published on 2025-09-25 and last updated on 2026-08-11.

CVE-2025-20362

CVE-2025-20362 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software with a CVSS 3.x base score of 6.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-09-25). The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 87% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-09-25)
EU (EUVD) id: EUVD-2025-31139
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-09-25)
Weakness: CWE-862
Affected product: Cisco Adaptive Security Appliance Software
Published: 2025-09-25
Last modified: 2026-08-11

Description

Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory. 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 unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.

Frequently asked questions

What is CVE-2025-20362?: Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory. 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 unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.
How severe is CVE-2025-20362?: CVE-2025-20362 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-20362 being actively exploited?: Yes. CVE-2025-20362 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-09-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-20362?: CVE-2025-20362 primarily affects Cisco Adaptive Security Appliance Software. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20362?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-20362 have an EU (EUVD) identifier?: Yes. CVE-2025-20362 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31139. It is also flagged as exploited in the EUVD (since 2025-09-25).
When was CVE-2025-20362 published?: CVE-2025-20362 was published on 2025-09-25 and last updated on 2026-08-11.

References

Affected products (2)

cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*

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