# CVE-2025-20362: Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization > Unauthenticated attackers can access restricted VPN endpoints and cause device reloads, requiring immediate software upgrades. - **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Yes, since 25 Sep 2025 (CISA KEV) - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 25 Sep 2025 - **Updated:** 26 Feb 2026 - **Also known as:** GHSA-wx28-57x9-xv5f ## What is CVE-2025-20362? CVE-2025-20362 is a medium-severity missing authorization vulnerability in Cisco Adaptive Security Appliance Software, published on 25 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. ### 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. Weakness: CWE-862 (Missing Authorization) ## Which versions are affected by CVE-2025-20362? It affects 2 products. Products: Cisco Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense. ## How do I fix CVE-2025-20362? No fix has been published for CVE-2025-20362 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 26 Sep 2025. ## Is CVE-2025-20362 being exploited? Yes. Attackers have exploited CVE-2025-20362 in the wild since at least 25 Sep 2025. Public exploit code: - Safe Python scanner for CVE-2025-20362 (Cisco ASA/FTD WebVPN Authentication Bypass) (github_poc): https://github.com/curtishoughton/CVE-2025-20362-Cisco-Scanner - Cisco Secure Firewall ASA & FTD - Authentication Bypass (nuclei): http/cves/2025/CVE-2025-20362.yaml ## Other vulnerabilities in Cisco Adaptive Security Appliance Software - [CVE-2025-20333](https://insights.sbomify.com/CVE-2025-20333/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow (critical 9.9, exploited in the wild) - [CVE-2016-6366](https://insights.sbomify.com/CVE-2016-6366/): Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow (high 8.8, exploited in the wild) - [CVE-2026-20349](https://insights.sbomify.com/CVE-2026-20349/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection (high 8.6, exploited in the wild) - [CVE-2024-20353](https://insights.sbomify.com/CVE-2024-20353/): Cisco ASA and FTD Denial of Service (high 8.6, exploited in the wild) - [CVE-2016-6367](https://insights.sbomify.com/CVE-2016-6367/): Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution (high 7.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-20362 and fix it if it is affected. What it is: CVE-2025-20362 is a medium-severity missing authorization vulnerability in Cisco Adaptive Security Appliance Software, published on 25 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: Yes. Attackers have exploited CVE-2025-20362 in the wild since at least 25 Sep 2025. Affected product: Cisco Adaptive Security Appliance Software. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2025-20362/ (Markdown: https://insights.sbomify.com/CVE-2025-20362/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20362 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20362 - OSV: https://osv.dev/vulnerability/CVE-2025-20362 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-20362/ Summaries are generated and may contain mistakes; the official description above is the record.