EUVD-2026-72609
GHSA-435m-cghg-23gf
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable L2TP parser with low-privilege L2TP session credential requirement; scope change reflects router gateway position compromising downstream traffic and hosts.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
7DescriptionCVE.org
A vulnerability has been found in D-Link DIR-822A A_101. Affected is the function tunnel_set_params of the component L2TP Control Message Parser. Such manipulation leads to out-of-bounds write. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Articles & Coverage 1
AnalysisAI
Out-of-bounds write in D-Link DIR-822A firmware A_101 allows network-reachable authenticated attackers to corrupt memory and likely achieve remote code execution by sending a crafted L2TP control message with a malformed Host Name AVP to the vulnerable tunnel_set_params function. A public proof-of-concept demonstrating the specific Host Name AVP overflow has been published on Notion, substantially lowering the exploitation barrier. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The DIR-822A must have its L2TP server component active and UDP port 1701 reachable from the attacker's network position. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N, score 8.6) captures the core risk posture: network-reachable, low complexity, low-privilege threshold, no user interaction required. … 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 | No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all D-Link DIR-822A routers with firmware A_101 and document their network locations and operational roles. …
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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