TL-MR100 v3.2: NULL Pointer Dereference
CVE-2026-8619 is a high-severity NULL pointer dereference vulnerability in TL-MR100 v3.2 from TP-Link, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version TL-MR100(EU)_V3.20_1.3.0 Build 260609 Rel.49957n as the first without the flaw, so updating TL-MR100 v3.2 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.87% chance of exploitation within 30 days, higher than 59% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update TL-MR100 v3.2 to TL-MR100(EU)_V3.20_1.3.0 Build 260609 Rel.49957n or a later version.
- Update TL-MR150 v.3.2 to TL-MR150(EU)_V3.20_1.3.0 Build 260720 Rel.59727n or a later version.
- Update TL-MR6400 v8.0 to TL-MR6400(EN)_V8_1.5.0 Build 260610 Rel.67978n or a later version.
- Read the advisory on tp-link.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| TP-Link | TL-MR100 v3.2 | before TL-MR100(EU)_V3.20_1.3.0 Build 260609 Rel.49957n | TL-MR100(EU)_V3.20_1.3.0 Build 260609 Rel.49957n |
| TP-Link | TL-MR150 v.3.2 | before TL-MR150(EU)_V3.20_1.3.0 Build 260720 Rel.59727n | TL-MR150(EU)_V3.20_1.3.0 Build 260720 Rel.59727n |
| TP-Link | TL-MR6400 v8.0 | before TL-MR6400(EN)_V8_1.5.0 Build 260610 Rel.67978n | TL-MR6400(EN)_V8_1.5.0 Build 260610 Rel.67978n |
| TP-Link | Archer MR600 v2 | before Archer MR600(EU)_V2_1.10.0 Build 260618 | Archer MR600(EU)_V2_1.10.0 Build 260618 |
| TP-Link | Tl-mr100 Firmware | before 1.3.0 | 1.3.0 |
| TP-Link | Archer Mr600 Firmware | before 1.10.0 | 1.10.0 |
| TP-Link | Tl-mr150 Firmware | before 1.3.0 | 1.3.0 |
| TP-Link | Tl-mr6400 Firmware | before 1.5.0 | 1.5.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.1 | High | CNA |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
An unauthenticated denial-of-service vulnerability was identified in TP-Link TL-MR100 v3.2, TL-MR150 v3.2, TL-MR6400 v8.0 and Archer MR600 v2, due to improper handling of exceptional request conditions that may lead to a NULL pointer dereference. A remote attacker on an adjacent network can send a specially crated HTTP request to trigger a crash of the HTTP service process. Successful exploitation may cause the HTTP service to crash, making the web management interface and HTTP-dependent functionality temporarily unavailable.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How developers prevent this class of flaw
- For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
- Select a programming language that is not susceptible to these issues.
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other references
Recent NULL Pointer Dereference vulnerabilities
- 7.8 High severity
- 8.2 High severity
- 7.8 High severity
- 7.5 High severity
- 7.4 High severity
- 7.4 High severity
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