How severe is CVE-2007-4909?

CVE-2007-4909 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2007-4909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4909?

CVE-2007-4909 primarily affects Winscp. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2007-4909 published?

CVE-2007-4909 was published on 2007-09-17 and last updated on 2026-06-16.

CVE-2007-4909

CVE-2007-4909 is a critical-severity vulnerability in Winscp with a CVSS 2.0 base score of 9.3. 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-264.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Winscp
Published: 2007-09-17
Last modified: 2026-06-16

Description

Interpretation conflict in WinSCP before 4.0.4 allows remote attackers to perform arbitrary file transfers with a remote server via file-transfer commands in the final portion of a (1) scp, and possibly a (2) sftp or (3) ftp, URL, as demonstrated by a URL specifying login to the remote server with a username of scp, which is interpreted as an HTTP scheme name by the protocol handler in a web browser, but is interpreted as a username by WinSCP. NOTE: this is related to an incomplete fix for CVE-2006-3015.

Frequently asked questions

What is CVE-2007-4909?: Interpretation conflict in WinSCP before 4.0.4 allows remote attackers to perform arbitrary file transfers with a remote server via file-transfer commands in the final portion of a (1) scp, and possibly a (2) sftp or (3) ftp, URL, as demonstrated by a URL specifying login to the remote server with a username of scp, which is interpreted as an HTTP scheme name by the protocol handler in a web browser, but is interpreted as a username by WinSCP. NOTE: this is related to an incomplete fix for CVE-2006-3015.
How severe is CVE-2007-4909?: CVE-2007-4909 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2007-4909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4909?: CVE-2007-4909 primarily affects Winscp. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-4909 published?: CVE-2007-4909 was published on 2007-09-17 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:winscp:winscp:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.5.5_beta:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.5.6:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.6:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.6.1:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.6.5_beta:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.6.6:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.6.7:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.8.1:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:3.8.2:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:4.0.3:*:*:*:*:*:*:*

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