How severe is CVE-2017-12627?

CVE-2017-12627 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-2017-12627 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12627?

CVE-2017-12627 affects Apache Xerces-c++. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12627?

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-2017-12627 published?

CVE-2017-12627 was published on 2018-03-01 and last updated on 2026-06-17.

CVE-2017-12627

CVE-2017-12627 is a critical-severity vulnerability in Apache Xerces-c++ 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-476.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Apache Xerces-c++
Published: 2018-03-01
Last modified: 2026-06-17

Description

In Apache Xerces-C XML Parser library before 3.2.1, processing of external DTD paths can result in a null pointer dereference under certain conditions.

Frequently asked questions

What is CVE-2017-12627?: In Apache Xerces-C XML Parser library before 3.2.1, processing of external DTD paths can result in a null pointer dereference under certain conditions.
How severe is CVE-2017-12627?: CVE-2017-12627 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-2017-12627 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12627?: CVE-2017-12627 affects Apache Xerces-c++. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12627?: 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-2017-12627 published?: CVE-2017-12627 was published on 2018-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:xerces-c\+\+:*:*:*:*:*:*:*:*

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