# What is CVE-2025-20362?

> CVE-2025-20362 is a high-severity flaw (CVSS 8.6) in Adaptive Security Appliance Software from Cisco, published on 25 September 2025. It is on the list of flaws known to be exploited, so criminals are already using it. The latest forecast puts its chance of use in the next 30 days at 87%. If you run an affected version, patch it first.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2025-20362

## At a glance

- **Verdict:** Fix this now. Attackers are using this flaw today. If you run an affected version, it goes to the top of your list.
- **Precursor Intelligence risk score:** 81 out of 100 (High); action: Emergency patch. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 8.6 out of 10)
- **Known to be exploited:** Yes, it is on the government list of flaws known to be exploited
- **Chance of use in the next 30 days:** 87% (latest exploit-likelihood forecast)
- **Published:** 25 September 2025
- **Record last updated:** 6 November 2025
- **Main product:** Adaptive Security Appliance Software from Cisco
- **Affected products:** 2

## What is CVE-2025-20362? In plain terms

It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### The official 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.

### What kind of flaw is it?

- CWE-862: Missing Authorization

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Easy: no special conditions
- Login needed first: No login needed
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can take it offline

Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`

## Is CVE-2025-20362 being exploited? Yes

Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 87%.

Exploit likelihood over the last 7 days: 87%, 87%, 87%, 87%, 87%, 87%, 87%.

### Timeline

- 25 September 2025: Published
- 26 September 2025: Added to the known-exploited list
- 6 November 2025: Record last updated
- 12 November 2025: Exploit likelihood jumped
- 2 January 2026: Exploit likelihood fell

### How Precursor Intelligence ranks it

CVE-2025-20362 scores **81 out of 100 (High)**, with the action "Emergency patch".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2025-20362?

The published record lists 2 products. Versions are as published: "9.12 to before 9.12.4.72" means from 9.12 up to, but not including, 9.12.4.72.

- [Adaptive Security Appliance Software](https://www.precursorintelligence.com/product/cisco/adaptive_security_appliance_software) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 9.12 to before 9.12.4.72, 9.14 to before 9.14.4.28, 9.16 to before 9.16.4.85, 9.17.0 to before 9.18.4.67, 9.19 to before 9.20.4.10, 9.22 to before 9.22.2.14, 9.23 to before 9.23.1.19
- [Firepower Threat Defense](https://www.precursorintelligence.com/product/cisco/firepower_threat_defense) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 7.0.0 to before 7.0.8.1, 7.1.0 to before 7.2.10.2, 7.3.0 to before 7.4.2.4, 7.6.0 to before 7.6.2.1, 7.7.0 to before 7.7.10.1

## How do I fix CVE-2025-20362?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Check it wasn’t used before you patched.** Because criminals are already using this flaw, look for signs of a break-in on affected systems using the vendor’s guidance.

### References

- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW) (Vendor advisory)
- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks) (Vendor advisory)
- [cisa.gov](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20362) (Government resource)

## Questions

### What is CVE-2025-20362?

CVE-2025-20362 is a high-severity flaw in Adaptive Security Appliance Software from Cisco, published on 25 September 2025. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### How serious is CVE-2025-20362?

It scores 8.6 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2025-20362 is 81 out of 100, which is High. Its action is "Emergency patch". Attackers are using this flaw today. If you run an affected version, it goes to the top of your list.

### Is CVE-2025-20362 being exploited?

Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 87%.

### Which versions does CVE-2025-20362 affect?

For Adaptive Security Appliance Software from Cisco: 9.12 to before 9.12.4.72, 9.14 to before 9.14.4.28, 9.16 to before 9.16.4.85, 9.17.0 to before 9.18.4.67, 9.19 to before 9.20.4.10, 9.22 to before 9.22.2.14 and 1 more. The record lists 2 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2025-20362?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. Because criminals are already using it, also check affected systems for signs of a break-in.

## Does CVE-2025-20362 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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