How severe is CVE-2018-21009?

CVE-2018-21009 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-21009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21009?

CVE-2018-21009 affects Freedesktop Poppler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-21009?

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-2018-21009 published?

CVE-2018-21009 was published on 2019-09-05 and last updated on 2026-06-17.

CVE-2018-21009

CVE-2018-21009 is a high-severity vulnerability in Freedesktop Poppler with a CVSS 3.x base score of 8.8. 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-190.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Freedesktop Poppler
Published: 2019-09-05
Last modified: 2026-06-17

Description

Poppler before 0.66.0 has an integer overflow in Parser::makeStream in Parser.cc.

Frequently asked questions

What is CVE-2018-21009?: Poppler before 0.66.0 has an integer overflow in Parser::makeStream in Parser.cc.
How severe is CVE-2018-21009?: CVE-2018-21009 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-21009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21009?: CVE-2018-21009 affects Freedesktop Poppler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-21009?: 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-2018-21009 published?: CVE-2018-21009 was published on 2019-09-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:*

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