CVE-2025-65493 | Vulnetix

CVE-2025-65493 PUBLISHED CVSS 7.5 HIGH

Reported by mitre · Published November 24, 2025

NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.

Risk scores

CVSS 3.1

7.5

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

Affected products

Vendor	Product	Versions
n/a	n/a	n/a
n/a	n/a	*

Timeline

Nov 24, 2025 CVE Published
Nov 24, 2025 CVE Updated
Nov 25, 2025 EPSS Score (30 in total, the first dated here)
Mar 26, 2026 Coalition ESS Score (2 in total, the first dated here)
Apr 2, 2026 Security Advisory

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vulnetix vdb vuln CVE-2025-65493
vulnetix vdb fixes CVE-2025-65493

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  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-65493/fixes/registry"

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References

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