How severe is CVE-2021-36489?

CVE-2021-36489 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-36489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36489?

CVE-2021-36489 affects Liballeg Allegro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36489?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36489 published?

CVE-2021-36489 was published on 2023-02-03 and last updated on 2026-06-17.

CVE-2021-36489

CVE-2021-36489 is a medium-severity vulnerability in Liballeg Allegro with a CVSS 3.x base score of 6.5. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Liballeg Allegro
Published: 2023-02-03
Last modified: 2026-06-17

Description

Buffer Overflow vulnerability in Allegro through 5.2.6 allows attackers to cause a denial of service via crafted PCX/TGA/BMP files to allegro_image addon.

Frequently asked questions

What is CVE-2021-36489?: Buffer Overflow vulnerability in Allegro through 5.2.6 allows attackers to cause a denial of service via crafted PCX/TGA/BMP files to allegro_image addon.
How severe is CVE-2021-36489?: CVE-2021-36489 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-36489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36489?: CVE-2021-36489 affects Liballeg Allegro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36489?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36489 published?: CVE-2021-36489 was published on 2023-02-03 and last updated on 2026-06-17.

References

https://github.com/liballeg/allegro5/issues/1251

Affected products (1)

cpe:2.3:a:liballeg:allegro:*:*:*:*:*:*:*:*

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