CVE-2020-9320

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

Published: 2020-02-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-9320 is rated Moderate Risk (48.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.88%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-9320

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-04 0.62% 0.88% +0.25%
2 2025-11-21 0.30% 0.62% +0.33%
3 2025-11-18 — 0.30% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-9320

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-9320

Affected software / configurations for CVE-2020-9320

Vendor Product Version Raw CPE
avira anti-malware_sdk < 8.3.54.138 cpe:2.3:a:avira:anti-malware_sdk:*:*:*:*:*:*:*:*
avira antivirus_server < 8.3.54.138 cpe:2.3:a:avira:antivirus_server:*:*:*:*:*:*:*:*
avira avira_antivirus_for_endpoint < 8.3.54.138 cpe:2.3:a:avira:avira_antivirus_for_endpoint:*:*:*:*:*:*:*:*
avira avira_antivirus_for_small_business < 8.3.54.138 cpe:2.3:a:avira:avira_antivirus_for_small_business:*:*:*:*:*:*:*:*
avira avira_exchange_security < 8.3.54.138 cpe:2.3:a:avira:avira_exchange_security:*:*:*:*:*:*:*:*
avira avira_free_security_suite < 8.3.54.138 cpe:2.3:a:avira:avira_free_security_suite:*:*:*:*:*:windows:*:*
avira avira_internet_security_suite < 8.3.54.138 cpe:2.3:a:avira:avira_internet_security_suite:*:*:*:*:*:windows:*:*
avira avira_prime < 8.3.54.138 cpe:2.3:a:avira:avira_prime:*:*:*:*:*:*:*:*

References for CVE-2020-9320

cvelogic Threat Intelligence