CVE-2025-62821

CVSS 9.1 CRITICALEPSS 0.8%CWE-125

Vexday Risk Score

48Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 9.1EPSS 0.8%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

25 Sep 2025Public PoC

19 Jun 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

n/a · n/a

public PoCs found — 1

githubgithub.com/hyunjungg/CVE-2025-62821★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://github.com/hyunjungg/CVE-2025-62821