CVE•Published 2026-06-19•Modified 2026-06-26•1 article on news•4 live references•NVD data

CVE-2026-48715Radvd.litech · Radvd

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 95% of all CVEs

Weaknesses (CWE)

CWE-121Stack-based Buffer Overflow

Description

radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the `radvdump` utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, `print_ff()` copies up to 2032 bytes from attacker-controlled packet data into a 16-byte `struct in6_addr` on the stack, overflowing by up to 2016 bytes. Note that the main `radvd` daemon is not affected by the vulnerability. Version 2.21 patches the issue.

Timeline

Published 2026-06-19

Modified 2026-06-26

External references

NVD MITRE Exploit-DB 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-2026-48715

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Radvd.litech Radvd"

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

Shodan · banner/body mention

http.html:"Radvd"

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

More intel sources (5)

Shodan report

vuln:CVE-2026-48715