What is CVE-2023-1900?

CVE-2023-1900 is a high-severity vulnerability in Avira Antivirus, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2023-04-19.

How severe is CVE-2023-1900?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Avira Antivirus

CVE-2023-1900

A vulnerability within the Avira network protection feature allowed an attacker with local execution rights to cause an overflow. This could corrupt the data on the heap and lead to a denial-of-service situation. Issue was fixed with Endpointprotection.exe version 1.0.2303.633

Vulnerability class: Integer Overflow

Published 2023-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Avira Antivirus
Avira Antivirus — versions 0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

support.norton.com/sp/static/external/tools/security-advisories.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-1900?: CVE-2023-1900 is a high-severity vulnerability in Avira Antivirus, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2023-04-19.
How severe is CVE-2023-1900?: High severity. CVSS v3 base score is 7.8 out of 10.