CVE•Published 2026-04-02•Modified 2026-06-05•1 article on news•6 live references•NVD data
CVE-2026-34877Arm · Mbed_tls
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
45
Exploit Prediction Scoring System · top 55% of all CVEs
Weaknesses (CWE)
Description
An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is caused by Incorrect Use of Privileged APIs.
Timeline
Published 2026-04-02
Modified 2026-06-05
External references
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-2026-34877Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Arm Mbed Tls"All exposed Arm Mbed Tls instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Mbed Tls"HTTP body or banner mentions "Mbed Tls" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-34877Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-34877Censys host search filtered to this CVE id.
grep.app
CVE-2026-34877Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-34877GitHub code search for direct mentions.
Google dork
"CVE-2026-34877" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-34877 on GitHub.