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CVE•Published 2026-05-04•Modified 2026-05-05•0 articles on news•4 live references•NVD data

CVE-2026-43859

Vulnerability data via NVD (ingested)

CVSS v3.1
3.7
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS percentile
8
Exploit Prediction Scoring System · top 92% of all CVEs
Weaknesses (CWE)
CWE-158Improper Neutralization of Null Byte or NUL Character
Description

mutt before 2.3.2 sometimes uses strfcpy instead of memcpy for the IMAP auth_cram MD5 digest.

Timeline
Published 2026-05-04
Modified 2026-05-05

External references

NVDMITREExploit-DBVulnCheck

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-2026-43859
Hosts Shodan has explicitly fingerprinted as vulnerable.
More intel sources (5)
Shodan report
vuln:CVE-2026-43859
Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-43859
Censys host search filtered to this CVE id.
grep.app
CVE-2026-43859
Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-43859
GitHub code search for direct mentions.
Google dork
"CVE-2026-43859" exploit -site:nvd.nist.gov
Write-ups and news, NVD excluded.

Known PoCs on GitHub (2)

CVE-2026-438592 repos
r00t4dm/r00t4dmunknown
★ 2·updated 5mo ago
TheBoscoClub/Audiobook-ManagerPython
Self-hosted audiobook library browser with conversion, web player, and optional Audible downloading
★ 2·updated 6d ago
We haven't classified any articles referencing CVE-2026-43859 yet. The external references above still apply.