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Fencer Intel
medium 5.5

CVE-2020-9320 json

Avira AV Engine before 8.3.54.138 allows virus-detection bypass via a crafted ISO archive.

published 6y ago modified 4mo ago also EUVD-2020-30142

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Avira AV Engine before 8.3.54.138 allows virus-detection bypass via a crafted ISO archive. This affects versions before 8.3.54.138 of Antivirus for Endpoint, Antivirus for Small Business, Exchange Security (Gateway), Internet Security Suite for Windows, Prime, Free Security Suite for Windows, and Cross Platform Anti-malware SDK. NOTE: Vendor asserts that vulnerability does not exist in product

Patch / fix

  • avira anti-malware_sdk 8.3.54.138
  • avira antivirus_server 8.3.54.138
  • avira avira_antivirus_for_endpoint 8.3.54.138
  • avira avira_antivirus_for_small_business 8.3.54.138
  • avira avira_exchange_security 8.3.54.138
  • avira avira_free_security_suite 8.3.54.138
  • avira avira_internet_security_suite 8.3.54.138
  • avira avira_prime 8.3.54.138

Is CVE-2020-9320 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

2.88% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Intel 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.