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CVE

CVE-2023-20269

First Reported
Oct 20, 2026
Latest Reported
Oct 20, 2026
Articles
1
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IOC
12
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CVE Enrichment

CVSS
9.1 CRITICAL
EPSS
25.45%
EPSS Percentile
97.94%
CISA KEV
YES — Known Exploited Vulnerability

Description

A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user. This vulnerability is due to improper separation of authentication, authorization, and accounting (AAA) between the remote access VPN feature and the HTTPS management and site-to-site VPN features. An attacker could exploit this vulnerability by specifying a default connection profile/tunnel group while conducting a brute force attack or while establishing a clientless SSL VPN session using valid credentials. A successful exploit could allow the attacker to achieve one or both of the following: Identify valid credentials that could then be used to establish an unauthorized remote access VPN session. Establish a clientless SSL VPN session (only when running Cisco ASA Software Release 9.16 or earlier). Notes: Establishing a client-based remote access VPN tunnel is not possible as these default connection profiles/tunnel groups do not and cannot have an IP address pool configured. This vulnerability does not allow an attacker to bypass authentication. To successfully establish a remote access VPN session, valid credentials are required, including a valid second factor if multi-factor authentication (MFA) is configured. Cisco will release software updates that address this vulnerability. There are workarounds that address this vulnerability.

Technical Details

CVSS Version
3.1
CNA / NVD Source
psirt@cisco.com
Published
07-Sep-2023 01:15
Last Modified
12-Aug-2026 02:33
EPSS Date
2026-10-20
CWE
CWE-288, CWE-863

CVSS Vector

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

CISA KEV Details

Date Added
2023-09-13
Remediation Due
2023-10-04
Known Ransomware Campaign Use
Known
Required Action
Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC; https://nvd.nist.gov/vuln/detail/CVE-2023-20269

Affected Products / Versions

References

Last enrichment sync: 21-Oct-2026 07:49
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE (4)

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Malware (1)

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Threat Actors (1)

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MITRE ATT&CK (15)

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Vendors (2)

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Products (5)

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Tools (10)

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Industries (1)

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Countries (1)

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