How severe is CVE-2021-37789?

CVE-2021-37789 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-37789 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37789?

CVE-2021-37789 primarily affects Stb Project Stb. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37789?

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-2021-37789 published?

CVE-2021-37789 was published on 2022-11-02 and last updated on 2026-06-17.

CVE-2021-37789

CVE-2021-37789 is a high-severity vulnerability in Stb Project Stb with a CVSS 3.x base score of 8.1. 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 8.1)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Stb Project Stb
Published: 2022-11-02
Last modified: 2026-06-17

Description

stb_image.h 2.27 has a heap-based buffer over in stbi__jpeg_load, leading to Information Disclosure or Denial of Service.

Frequently asked questions

What is CVE-2021-37789?: stb_image.h 2.27 has a heap-based buffer over in stbi__jpeg_load, leading to Information Disclosure or Denial of Service.
How severe is CVE-2021-37789?: CVE-2021-37789 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-37789 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37789?: CVE-2021-37789 primarily affects Stb Project Stb. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37789?: 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-2021-37789 published?: CVE-2021-37789 was published on 2022-11-02 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:stb_project:stb:2.27:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Stb Project Stb

CVE-2019-15058 — Critical (CVSS 9.1): stb_image.h (aka the stb image loader) 2.23 has a heap-based buffer over-read in stbi__tga_load, leading to Information…
CVE-2022-28048 — High (CVSS 8.8): STB v2.27 was discovered to contain an integer shift of invalid size in the component stbi__jpeg_decode_block_prog_ac.
CVE-2021-28021 — High (CVSS 7.8): Buffer overflow vulnerability in function stbi__extend_receive in stb_image.h in stb 2.26 via a crafted JPEG file.

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