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HomeCVEsCVE-2023-20269

CVE-2023-20269

Published: January 27, 2026
Last updated:8 hours ago (January 27, 2026)
Exploit: YesZero-day: YesPatch: YesTrend: Neutral
TL;DR
Updated January 27, 2026

CVE-2023-20269 is a critical severity vulnerability with a CVSS score of 9.1. Exploits are available; patches have been released and should be applied urgently. This is classified as a zero-day vulnerability.

Key Points
  • 1Critical severity (CVSS 9.1/10)
  • 2EPSS: 1.00% - moderate likelihood of exploitation
  • 3Public exploits are available
  • 4Vendor patches are available
  • 5Strobes Priority Score: 929/1000 (Critical)
  • 6Affects products from: Cisco
Severity Scores
CVSS v39.1
CVSS v20.0
Priority Score929.0
EPSS Score1.0
Critical
Exploitation LikelihoodLow
1.00%EPSS

Lower probability of exploitation

Patch during regular maintenance
1.00%
EPSS
9.1
CVSS
Yes
Exploit
Yes
Patch
Critical Priority
exploit exists • critical severity • high priority

EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.

Description

Cisco Adaptive Security Appliance and Firepower Threat Defense contain an unauthorized access vulnerability that could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or establish a clientless SSL VPN session with an unauthorized user.

CVSS v3 Breakdown
Attack Vector:Network
Attack Complexity:Local
Privileges Required:Network
User Interaction:Network
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability:Network
Exploit References
Cisa.gov
Patch References
[email protected]Zeroday CZ
Trend Analysis
Neutral
Vulnerable Products
VendorProduct
CiscoAdaptive Security Appliance Software
CiscoFirepower Threat Defense
Advisories
CISA: Cisco Adaptive Security Appliance and Firepower Threat Defense contain an unauthorized access vulnerability that could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or establish a clientless SSL VPN session with an unauthorized user.
GitHub AdvisoryNVD
Cite This Page
APA Format
Strobes VI. (2026). CVE-2023-20269 - CVE Details and Analysis. Strobes VI. Retrieved January 27, 2026, from https://vi.strobes.co/cve/CVE-2023-20269
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