How severe is CVE-2009-3551?

CVE-2009-3551 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-3551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3551?

CVE-2009-3551 primarily affects Wireshark. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-3551 published?

CVE-2009-3551 was published on 2009-10-30 and last updated on 2026-06-16.

CVE-2009-3551

CVE-2009-3551 is a medium-severity vulnerability in Wireshark with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Wireshark
Published: 2009-10-30
Last modified: 2026-06-16

Description

Off-by-one error in the dissect_negprot_response function in packet-smb.c in the SMB dissector in Wireshark 1.2.0 through 1.2.2 allows remote attackers to cause a denial of service (application crash) via a file that records a malformed packet trace. NOTE: some of these details are obtained from third party information.

Frequently asked questions

What is CVE-2009-3551?: Off-by-one error in the dissect_negprot_response function in packet-smb.c in the SMB dissector in Wireshark 1.2.0 through 1.2.2 allows remote attackers to cause a denial of service (application crash) via a file that records a malformed packet trace. NOTE: some of these details are obtained from third party information.
How severe is CVE-2009-3551?: CVE-2009-3551 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-3551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3551?: CVE-2009-3551 primarily affects Wireshark. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3551 published?: CVE-2009-3551 was published on 2009-10-30 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:wireshark:wireshark:1.2:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:1.2.1:*:*:*:*:*:*:*

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