CVE-2023-1900

SYSTEM code execution via network-filter integer overflow

Published Apr 19, 2023 · Updated Feb 5, 2025

Integer overflow in Avira Antivirus for Windows before 1.0.2303.633 allows local users to execute arbitrary code as SYSTEM. The netprotection network filter driver fails to validate user-supplied data, causing an integer overflow before a memory write. Low-privileged code execution is required; exploitation grants SYSTEM privileges, while heap corruption can interrupt service.

CVSS severity7.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Avira Antivirus for Windows before 1.0.2303.633 allows local users to execute arbitrary code as SYSTEM. The netprotection network filter driver fails to validate user-supplied data, causing an integer overflow before a memory write. Low-privileged code execution is required; exploitation grants SYSTEM privileges, while heap corruption can interrupt service.

The record

CVE
CVE-2023-1900
Published
Apr 19, 2023
Updated
Feb 5, 2025
Vendor
Gen Digital
Product
Avira Antivirus
Classifications
CWE-190, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.0.2303.633

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Gen Digital · Avira Antivirusversion=0 <1.0.2303.633

Published CVSS scores

7.8Gen DigitalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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