How severe is CVE-2009-4487?

CVE-2009-4487 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-4487 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4487?

CVE-2009-4487 affects F5 Nginx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4487?

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

When was CVE-2009-4487 published?

CVE-2009-4487 was published on 2010-01-13 and last updated on 2026-06-16.

CVE-2009-4487

CVE-2009-4487 is a medium-severity vulnerability in F5 Nginx with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 27% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: F5 Nginx
Published: 2010-01-13
Last modified: 2026-06-16

Description

nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

Frequently asked questions

What is CVE-2009-4487?: nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
How severe is CVE-2009-4487?: CVE-2009-4487 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-4487 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4487?: CVE-2009-4487 affects F5 Nginx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4487?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4487 published?: CVE-2009-4487 was published on 2010-01-13 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:f5:nginx:0.7.64:*:*:*:*:*:*:*

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