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Fencer Vulns
high 7.5

CVE-2023-5594 json

Improper following of a certificate's chain of trust in ESET security products

published 2023-12-21 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57887

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Improper validation of the server’s certificate chain in secure traffic scanning feature considered intermediate certificate signed using the MD5 or SHA1 algorithm as trusted.

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
NVD 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Affected products

  • ESET, spol. s r.o. ESET NOD32 Antivirus
  • ESET, spol. s r.o. ESET Internet Security
  • ESET, spol. s r.o. ESET Smart Security Premium
  • ESET, spol. s r.o. ESET Security Ultimate
  • ESET, spol. s r.o. ESET Endpoint Antivirus
  • ESET, spol. s r.o. ESET Endpoint Security
  • ESET, spol. s r.o. ESET Endpoint Antivirus for Linux 10.0 and above
  • ESET, spol. s r.o. ESET Server Security for Windows Server
  • ESET, spol. s r.o. ESET Mail Security for Microsoft Exchange Server
  • ESET, spol. s r.o. ESET Mail Security for IBM Domino
  • ESET, spol. s r.o. ESET Security for Microsoft SharePoint Server
  • ESET, spol. s r.o. ESET File Security for Microsoft Azure
  • ESET, spol. s r.o. ESET Server Security for Linux 10.1 and above

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.