How severe is CVE-2015-3210?

CVE-2015-3210 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-3210 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3210?

CVE-2015-3210 primarily affects Pcre Pcre2. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3210?

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-2015-3210 published?

CVE-2015-3210 was published on 2016-12-13 and last updated on 2026-06-17.

CVE-2015-3210

CVE-2015-3210 is a critical-severity vulnerability in Pcre Pcre2 with a CVSS 3.x base score of 9.8. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Pcre Pcre2
Published: 2016-12-13
Last modified: 2026-06-17

Description

Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code via a crafted regular expression, as demonstrated by /^(?P=B)((?P=B)(?J:(?P<B>c)(?P<B>a(?P=B)))>WGXCREDITS)/, a different vulnerability than CVE-2015-8384.

Frequently asked questions

What is CVE-2015-3210?: Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code via a crafted regular expression, as demonstrated by /^(?P=B)((?P=B)(?J:(?P<B>c)(?P<B>a(?P=B)))>WGXCREDITS)/, a different vulnerability than CVE-2015-8384.
How severe is CVE-2015-3210?: CVE-2015-3210 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-3210 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3210?: CVE-2015-3210 primarily affects Pcre Pcre2. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-3210?: 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-2015-3210 published?: CVE-2015-3210 was published on 2016-12-13 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:pcre:pcre2:10.10:*:*:*:*:*:*:*
cpe:2.3:a:pcre:pcre:8.34:*:*:*:*:*:*:*
cpe:2.3:a:pcre:pcre:8.35:*:*:*:*:*:*:*
cpe:2.3:a:pcre:pcre:8.36:*:*:*:*:*:*:*
cpe:2.3:a:pcre:pcre:8.37:*:*:*:*:*:*:*

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