WAYOS FBM-220G 24.10.19 rc sub_40F820 upnp_waniface/upnp_ssdp_interval/upnp_max_age command injection
Summary
A vulnerability was found in WAYOS FBM-220G 24.10.19. It has been rated as critical. This impacts the function sub_40F820 of the file rc. The manipulation of the argument upnp_waniface/upnp_ssdp_interval/upnp_max_age leads to command injection.
This vulnerability is uniquely identified as CVE-2026-2548. The attack is possible to be carried out remotely. Moreover, an exploit is present.
The vendor was contacted early about this disclosure but did not respond in any way.
Details
A vulnerability was found in WAYOS FBM-220G 24.10.19. It has been rated as critical. This issue affects the function sub_40F820 of the file rc. The manipulation of the argument upnp_waniface/upnp_ssdp_interval/upnp_max_age with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.
The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-2548. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/19/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.
It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-6105). If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Product
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 6.3VulDB Meta Temp Score: 6.0
VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 6.3
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Command injectionCWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Status: Proof-of-Concept
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
02/15/2026 Advisory disclosed02/15/2026 VulDB entry created
02/19/2026 VulDB entry last update
Sources
Advisory: github.comStatus: Not defined
CVE: CVE-2026-2548 (🔒)
GCVE (CVE): GCVE-0-2026-2548
GCVE (VulDB): GCVE-100-346157
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 02/15/2026 17:09Updated: 02/19/2026 00:02
Changes: 02/15/2026 17:09 (55), 02/16/2026 10:56 (30), 02/18/2026 14:29 (1), 02/19/2026 00:02 (1)
Complete: 🔍
Submitter: jfkk
Cache ID: 216::103
Submit
Accepted
- Submit #749802: WAYOS FBM220G and others 24.10.19 Command Injection (by jfkk)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
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