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VulnerabilityPublished

CVE-2026-20250: CWE-772

Source GCVE Database

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Authoritative record:CVE-2026-20250· High 8.6

Not known to be exploited · CVSS 8.6 High.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) SoftwareAffected
  • 9.22.1.1 – 9.24.1
17 affected builds
Fixed in–
CiscoCisco Secure Firewall Threat Defense (FTD) SoftwareAffected
  • 7.6.0 – 10.0.0
10 affected builds
Fixed in–

AI-suggested

Until a patch is available, monitor for unusual DTLS traffic and consider network-level controls to limit exposure to untrusted sources sending DTLS traffic to affected devices.

Description

A high-severity vulnerability in the Datagram TLS (DTLS) message handling of Cisco Secure Firewall ASA and FTD Software for 3100 and 4200 Series devices allows an unauthenticated remote attacker to cause a denial of service (DoS) by sending crafted DTLS traffic. The flaw arises from improper resource management during DTLS message processing, potentially causing the device to reload and disrupt service.

References

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