How severe is CVE-2021-40263?

CVE-2021-40263 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-2021-40263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40263?

CVE-2021-40263 affects Freeimage Project Freeimage. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40263?

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-2021-40263 published?

CVE-2021-40263 was published on 2023-08-22 and last updated on 2026-06-17.

CVE-2021-40263

CVE-2021-40263 is a high-severity vulnerability in Freeimage Project Freeimage 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Freeimage Project Freeimage
Published: 2023-08-22
Last modified: 2026-06-17

Description

A heap overflow vulnerability in FreeImage 1.18.0 via the ofLoad function in PluginTIFF.cpp.

Frequently asked questions

What is CVE-2021-40263?: A heap overflow vulnerability in FreeImage 1.18.0 via the ofLoad function in PluginTIFF.cpp.
How severe is CVE-2021-40263?: CVE-2021-40263 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-2021-40263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40263?: CVE-2021-40263 affects Freeimage Project Freeimage. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40263?: 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-2021-40263 published?: CVE-2021-40263 was published on 2023-08-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freeimage_project:freeimage:1.18.0:*:*:*:*:*:*:*

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