How severe is CVE-2001-0042?

CVE-2001-0042 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2001-0042 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0042?

CVE-2001-0042 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0042?

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

When was CVE-2001-0042 published?

CVE-2001-0042 was published on 2001-02-16 and last updated on 2026-06-16.

CVE-2001-0042

CVE-2001-0042 is a medium-severity vulnerability in Apache Http Server 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.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 9% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Http Server
Published: 2001-02-16
Last modified: 2026-06-16

Description

PHP 3.x (PHP3) on Apache 1.3.6 allows remote attackers to read arbitrary files via a modified .. (dot dot) attack containing "%5c" (encoded backslash) sequences.

Frequently asked questions

What is CVE-2001-0042?: PHP 3.x (PHP3) on Apache 1.3.6 allows remote attackers to read arbitrary files via a modified .. (dot dot) attack containing "%5c" (encoded backslash) sequences.
How severe is CVE-2001-0042?: CVE-2001-0042 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-0042 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0042?: CVE-2001-0042 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0042?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-0042 published?: CVE-2001-0042 was published on 2001-02-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache:http_server:1.3:*:*:*:*:*:*:*

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