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HomeCVEsCVE-2023-27997

CVE-2023-27997

Published: January 26, 2026
Last updated:22 hours ago (January 26, 2026)
Exploit: YesZero-day: YesPatch: YesTrend: Trending
TL;DR
Updated January 26, 2026

CVE-2023-27997 is a critical severity vulnerability with a CVSS score of 9.8. 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 9.8/10)
  • 2EPSS: 89.00% - very high likelihood of exploitation
  • 3Public exploits are available
  • 4Vendor patches are available
  • 5Strobes Priority Score: 999/1000 (Critical)
  • 6Affects products from: Fortinet
Severity Scores
CVSS v39.8
CVSS v20.0
Priority Score999.0
EPSS Score89.0
Critical
Exploitation LikelihoodCritical
89.00%EPSS

Very high probability of exploitation in the next 30 days

Immediate patching required
89.00%
EPSS
9.8
CVSS
Yes
Exploit
Yes
Patch
Critical Priority
high EPSS • 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

Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.

CVSS v3 Breakdown
Attack Vector:Network
Attack Complexity:Local
Privileges Required:Network
User Interaction:Network
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability:High
Exploit References
Cisa.govGitHubGitHubGitHubGitHubGitHubGitHubGitHubGitHubGitHub
Patch References
[email protected]Zeroday CZ
Trend Analysis
Trending
Vulnerable Products
VendorProduct
FortinetFortigate 6000
FortinetFortios
FortinetFortigate 7000
FortinetFortiproxy
Advisories
CISA: Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.
GitHub AdvisoryNVD
Cite This Page
APA Format
Strobes VI. (2026). CVE-2023-27997 - CVE Details and Analysis. Strobes VI. Retrieved January 27, 2026, from https://vi.strobes.co/cve/CVE-2023-27997
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