CVE-2026-63626 Mongoose - Buffer Overflow

Mongoose < 7.23 contains a buffer overflow caused by improper validation of the IPv6CP length field in ppp_handle_ipv6cp(), letting unauthenticated adjacent peers cause memory corruption or denial of service, exploit requires adjacent PPP or PPPoE link with specific features enabled.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to version 7.23 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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