CVE-2009-1783: Multiple FRISK Software F-Prot anti-virus products, including Antivirus for Exchange, Linux on IBM zSeries, Li

This week

HIGH 10.0WATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2009-1783 is a high-severity flaw (CVSS 10.0) affecting f-prot antivirus, f-prot aves, f-prot milter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple FRISK Software F-Prot anti-virus products, including Antivirus for Exchange, Linux on IBM zSeries, Linux x86 File Servers, Linux x86 Mail Servers, Linux x86 Workstations, Solaris Mail Servers, Antivirus for Windows, and others, allow remote attackers to bypass malware detection via a crafted CAB archive.

Why this priority

Critical severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-20
Published	2009-05-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: f-prot

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-05-22 20:30 UTCPublished CVE record published
2026-06-16 23:08 UTCUpdated Record last modified

f-prot f-prot antivirus MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy f-prot-antivirus || rpm -q f-prot-antivirus || f-prot-antivirus --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

f-prot f-prot aves MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy f-prot-aves || rpm -q f-prot-aves || f-prot-aves --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

f-prot f-prot milter MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy f-prot-milter || rpm -q f-prot-milter || f-prot-milter --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2009-1783?

f-prot antivirus: mitigate or apply the listed mitigation; f-prot aves: mitigate or apply the listed mitigation; f-prot milter: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-1783 being exploited?

CVE-2009-1783 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-2009-1783 affect?

CVE-2009-1783 affects f-prot antivirus, f-prot aves, f-prot milter. Severity is high (CVSS 10.0). Multiple FRISK Software F-Prot anti-virus products, including Antivirus for Exchange, Linux on IBM zSeries, Linux x86 File Servers, Linux x86 Mail Servers, Linux x86 Workstations, Solaris Mail Servers, Antivirus for Windows, and others, all

How urgent is CVE-2009-1783?

Priority 62/100. Critical severity; On your watchlist

Software pages

Windows vulnerabilities

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References

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