How severe is CVE-2026-48715?

CVE-2026-48715 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-48715 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48715?

CVE-2026-48715 affects Radvd.litech Radvd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48715?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-48715 have an EU (EUVD) identifier?

Yes. CVE-2026-48715 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38070.

When was CVE-2026-48715 published?

CVE-2026-48715 was published on 2026-06-19 and last updated on 2026-06-26.

CVE-2026-48715

CVE-2026-48715 is a high-severity vulnerability in Radvd.litech Radvd with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38070
Weakness: CWE-121
Affected product: Radvd.litech Radvd
Published: 2026-06-19
Last modified: 2026-06-26

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.

Frequently asked questions

What is CVE-2026-48715?: 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.
How severe is CVE-2026-48715?: CVE-2026-48715 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-48715 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48715?: CVE-2026-48715 affects Radvd.litech Radvd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48715?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-48715 have an EU (EUVD) identifier?: Yes. CVE-2026-48715 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38070.
When was CVE-2026-48715 published?: CVE-2026-48715 was published on 2026-06-19 and last updated on 2026-06-26.

References

Affected products (1)

cpe:2.3:a:radvd.litech:radvd:*:*:*:*:*:*:*:*

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