CVE•Published 2026-06-25•Modified 2026-06-26•1 article on news•6 live references•NVD data

CVE-2026-7531Wolfssl · Wolfssl

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

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Weaknesses (CWE)

CWE-416Use After Free

Description

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

Timeline

Published 2026-06-25

Modified 2026-06-26

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-7531

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Wolfssl Wolfssl"

All exposed Wolfssl Wolfssl instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Wolfssl"

HTTP body or banner mentions "Wolfssl" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-7531