Intel

CVE-2026-20250

Eine Schwachstelle in der Handhabung von Datagram TLS (DTLS)-Nachrichten in der Cisco Secure Firewall Adaptive Security Appliance (ASA) S…

highEPSS 0.5%

Description

A vulnerability in Datagram TLS (DTLS) message handling of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Secure Firewall 3100 Series and 4200 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when processing certain DTLS messages. An attacker could exploit this vulnerability by sending a crafted stream of DTLS traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Source: cvelistv5cisco_csafNVD (NIST)CVE.org (MITRE)BSI CSAFBSI WID Portal

Metrics

XIEM Effective CVSS
8.6
Source: nvd-v3
EPSS percentile
44.3 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
high
Priority score
88.66
Exploit maturity
no public PoC known
CVSS v3
8.6
EPSS score
0.5 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-09-16 21:17 UTC
CWE
CWE-772

Weakness classes (CWE)

  • CWE-772Base

    Missing Release of Resource after Effective Lifetime

    The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-09-17 15:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-20250","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technical…
  2. New CVE Received2026-09-16 21:17 UTC· psirt@cisco.com
    • Description: A vulnerability in Datagram TLS (DTLS) message handling of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Secure Firewall 3100 Series and 4200 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when processing certain DTLS messages. An attacker could exploit this vulnerability by sending a crafted stream of DTLS traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
    • CWE: CWE-772
    • Affected: New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/20xxx/CVE-2026-20250.json">CVE-2026-20250</a>

Linked advisories