CVE-2025-9033— Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 3)
Quick assessment
Affected
Gen Digital Avira Antivirus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Gen Digital Avira Antivirus是美国Gen Digital公司的一款防病毒与网络安全软件。 Gen Digital Avira Antivirus 8.3.70.76之前版本存在缓冲区错误漏洞，该漏洞源于扫描恶意PDF文件时存在堆缓冲区越界读取，可能导致本地执行代码或拒绝服务。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Gen Digital | Avira Antivirus | < 8.3.70.76 |
affected |
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I. Basic Information for CVE-2025-9033
Vulnerability Information
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Vulnerability Title
Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 3)
Source: CVE Program / CVE List V5
Vulnerability Description
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.76.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Gen Digital Avira Antivirus 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gen Digital Avira Antivirus是美国Gen Digital公司的一款防病毒与网络安全软件。 Gen Digital Avira Antivirus 8.3.70.76之前版本存在缓冲区错误漏洞，该漏洞源于扫描恶意PDF文件时存在堆缓冲区越界读取，可能导致本地执行代码或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Gen Digital | Avira Antivirus | 0 ~ 8.3.70.76 | - |
|
II. Public POCs for CVE-2025-9033
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Gen Digital · 2026-06-12 · 17 CVEs total
| CVE-2026-6676 | 7.8 HIGH | Avira antivirus engine heap buffer OOB write when scanning a malformed POSIX tar archive |
| CVE-2025-7003 | 7.8 HIGH | Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 1) |
| CVE-2025-7002 | 7.8 HIGH | Avira antivirus engine heap buffer OOB read when scanning a malformed PDF file (variant 2) |
| CVE-2025-7008 | 7.8 HIGH | Avast antivirus heap buffer OOB read when scanning a malformed PE file |
| CVE-2025-7009 | 7.8 HIGH | Avast antivirus heap buffer OOB read when scanning a malformed PE file |
| CVE-2025-7017 | 7.8 HIGH | Avira antivirus engine heap buffer OOB read when scanning a malformed Windows MSI file |
| CVE-2025-7004 | 7.8 HIGH | Avast antivirus heap buffer OOB write when scanning a malformed PE file |
| CVE-2025-7011 | 7.8 HIGH | Avast antivirus heap OOB when scanning a malformed zip file |
| CVE-2025-9032 | 7.8 HIGH | Avira antivirus engine heap buffer OOB read when scanning a malformed PE file |
| CVE-2025-14098 | 7.8 HIGH | Avira antivirus engine heap buffer OOB write when scanning a malformed MS-DOS executable f |
| CVE-2026-12068 | 7.4 HIGH | Avira Password Manager credential disclosure via cross-origin autofill in Firefox |
| CVE-2025-7006 | 5.5 MEDIUM | Avast antivirus use of stack memory after free when scanning a malformed PE file |
| CVE-2025-7010 | 5.5 MEDIUM | Avast antivirus stack overflow when scanning a malformed PDF file |
| CVE-2025-7005 | 5.5 MEDIUM | Avast antivirus infinite recursion when scanning a malformed PE file |
| CVE-2025-7018 | 5.5 MEDIUM | Avira antivirus engine null pointer dereference when scanning a malformed PE file |
| CVE-2025-7019 | 5.5 MEDIUM | Avast antivirus stack overflow when scanning a malformed Office Open XML file |
IV. Related Vulnerabilities
Same product: Avira Antivirus
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CVE-2026-6676
Avira antivirus engine heap buffer OOB write when scanning a -
CVE-2025-14098
Avira antivirus engine heap buffer OOB write when scanning a -
CVE-2025-9032
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CVE-2025-9032
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Same weakness: CWE-125
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V. Comments for CVE-2025-9033
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