CVE-2020-9295: FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and bel

Q: How do I fix CVE-2020-9295?

antivirus engine: upgrade to 6.00145. Exact commands for each OS are on this page.

Q: Is CVE-2020-9295 being exploited?

CVE-2020-9295 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-9295 affect?

CVE-2020-9295 affects antivirus engine. Severity is medium (CVSS 4.7). FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-st

Q: How urgent is CVE-2020-9295?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 4.7UPGRADE

CVE-2020-9295 is a medium-severity flaw (CVSS 4.7) affecting antivirus engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-standard RAR archives, potentially containing malicious files. Based on the samples provided, FortiClient will detect the malicious files upon trying extraction by real-time scanning and FortiGate will detect the

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-358
Published	2025-03-17
Last modified	2026-06-17

Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-17 14:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

fortinet antivirus engine UPGRADE

Affected: < 6.00145

Fixed in: 6.00145

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy antivirus-engine || rpm -q antivirus-engine || antivirus-engine --version

2. UPGRADE to 6.00145 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade antivirus-engine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade antivirus-engine

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-9295?

antivirus engine: upgrade to 6.00145. Exact commands for each OS are on this page.

Is CVE-2020-9295 being exploited?

CVE-2020-9295 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-9295 affect?

CVE-2020-9295 affects antivirus engine. Severity is medium (CVSS 4.7). FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-st

How urgent is CVE-2020-9295?

Priority 23/100. No elevated risk signals yet.

Software pages

Fortinet FortiOS vulnerabilities · Fortinet vulnerabilities

References

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