EUVD-2026-66246Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
PR:L reflects the requirement to be an established PPP peer; AV:N covers network-reachable PPP scenarios (PPPoE, VPN); full C/I/A reflects root-level RCE potential.
Primary rating from Vendor (freebsd).
CVSS VectorVendor: freebsd
Lifecycle Timeline
8DescriptionCVE.org
mp_Enddisc() used incorrect length calculations when formatting endpoint discriminator addresses for display, allowing a received endpoint option to overflow a global result buffer.
A malicious PPP peer can crash ppp(8) or potentially execute arbitrary code as root.
AnalysisAI
Heap-based buffer overflow in FreeBSD's ppp(8) daemon allows a malicious PPP peer to crash the daemon or execute arbitrary code as root. The flaw resides in mp_Enddisc(), which miscalculates buffer lengths when formatting Multilink PPP endpoint discriminator addresses, overflowing a global result buffer. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target system is actively running ppp(8) and has Multilink PPP (MP) negotiation enabled, specifically accepting endpoint discriminator options from peers. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 base score reflects a network-reachable, low-complexity attack with low-privilege requirements (AV:N/AC:L/PR:L/UI:N) yielding full confidentiality, integrity, and availability impact - consistent with potential root RCE. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches documented in FreeBSD Security Advisory FreeBSD-SA-26:60.ppp.asc (https://security.freebsd.org/advisories/FreeBSD-SA-26:60.ppp.asc): upgrade to FreeBSD 14.4-RELEASE-p9, 15.0-RELEASE-p13, or 15.1-RELEASE-p3 as appropriate for the installed release train. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all FreeBSD systems running ppp(8) and determine which installations have PPP services actively exposed to external or untrusted networks; prioritize assessment for systems in customer-facing or remote-access roles. …
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External POC / Exploit Code
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