CVE•Published 2026-07-17•Modified 2026-08-17•0 articles on news•6 live references•NVD data

CVE-2026-48487Paulsm · Zeroconf

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 89% of all CVEs

Weaknesses (CWE)

CWE-130Improper Handling of Length Parameter Inconsistency

Description

Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.16, _read_character_string and _read_string in src/zeroconf/_protocol/incoming.py advanced self.offset by attacker-declared RDLENGTH without checking it against self._data_len, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to send a TXT, HINFO, or A/AAAA record with rdlength=65535 and seed DNSCache and ServiceInfo.properties with truncated, attacker-shaped key/value or address records. This issue is fixed in version 0.149.16.

Timeline

Published 2026-07-17

Modified 2026-08-17

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus 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-2026-48487

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Paulsm Zeroconf"

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

Shodan · banner/body mention

http.html:"Zeroconf"

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

More intel sources (5)

Shodan report

vuln:CVE-2026-48487