What is CVE-2026-33987?

CVE-2026-33987 is a high-severity vulnerability in Freerdp, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-03-30.

How severe is CVE-2026-33987?

High severity. CVSS v3 base score is 7.1 out of 10.

Buffer overflow in Freerdp

CVE-2026-33987

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in persistent_cache_read_entry_v3() in libfreerdp/cache/persistent.c, persistent->bmpSize is updated before winpr_aligned_recalloc(). If realloc fails, bmpSize is inflated while bmpData points to the old buffer. This issue has been patched in version 3.24.2.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.

Affected products

Freerdp — versions < 3.24.2

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33987?: CVE-2026-33987 is a high-severity vulnerability in Freerdp, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-03-30.
How severe is CVE-2026-33987?: High severity. CVSS v3 base score is 7.1 out of 10.