How severe is CVE-2015-8393?

CVE-2015-8393 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2015-8393 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8393?

CVE-2015-8393 primarily affects Pcre Perl Compatible Regular Expression Library. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-8393?

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

When was CVE-2015-8393 published?

CVE-2015-8393 was published on 2015-12-02 and last updated on 2026-06-17.

CVE-2015-8393

CVE-2015-8393 is a high-severity vulnerability in Pcre Perl Compatible Regular Expression Library with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Pcre Perl Compatible Regular Expression Library
Published: 2015-12-02
Last modified: 2026-06-17

Description

pcregrep in PCRE before 8.38 mishandles the -q option for binary files, which might allow remote attackers to obtain sensitive information via a crafted file, as demonstrated by a CGI script that sends stdout data to a client.

Frequently asked questions

What is CVE-2015-8393?: pcregrep in PCRE before 8.38 mishandles the -q option for binary files, which might allow remote attackers to obtain sensitive information via a crafted file, as demonstrated by a CGI script that sends stdout data to a client.
How severe is CVE-2015-8393?: CVE-2015-8393 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2015-8393 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8393?: CVE-2015-8393 primarily affects Pcre Perl Compatible Regular Expression Library. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-8393?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-8393 published?: CVE-2015-8393 was published on 2015-12-02 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

More vulnerabilities in Pcre Perl Compatible Regular Expression Library

CVE-2015-8394 — Critical (CVSS 9.8): PCRE before 8.38 mishandles the (?(<digits>) and (?(R<digits>) conditions, which allows remote attackers to cause a…
CVE-2015-8390 — Critical (CVSS 9.8): PCRE before 8.38 mishandles the [: and \\ substrings in character classes, which allows remote attackers to cause a…
CVE-2015-8389 — Critical (CVSS 9.8): PCRE before 8.38 mishandles the /(?:|a|){100}x/ pattern and related patterns, which allows remote attackers to cause a…
CVE-2015-8386 — Critical (CVSS 9.8): PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually recursive subpatterns, which allows…
CVE-2015-8383 — Critical (CVSS 9.8): PCRE before 8.38 mishandles certain repeated conditional groups, which allows remote attackers to cause a denial of…
CVE-2015-8395 — High (CVSS 7.5): PCRE before 8.38 mishandles certain references, which allows remote attackers to cause a denial of service or possibly…

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Threat intelligence

Threat-intel indicators referencing this CVE:

183.182.99.92 (ipv4-addr)
103.153.190.105 (ipv4-addr)
188.44.20.32 (ipv4-addr)
198.199.94.79 (ipv4-addr)
122.3.106.113 (ipv4-addr)