CVE-2021-21971
published 2022-02-04CVE-2021-21971: An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload…
PriorityP431medium5.9CVSS 3.1
AVNACHPRNUINSUCNIHAN
EPSS
0.70%
48.3th percentile
An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| sealevel | seaconnect_370w_firmware | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv3.03.7LOWCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv5.5MEDIUM
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OSV
linux-azure vulnerabilities
osv·2025-05-07·CVSS 5.5
linux-azure vulnerabilities
linux-azure vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Block layer subsystem;
- Character device driver;
- Hardware crypto device drivers;
- GPU drivers;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- USB Gadget drivers;
- Framebuffer layer;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) client;
- NILFS2 file system;
- SMB network file system;
- Netfilter;
- CAN network layer;
- IPv6 networking;
- MAC80211 subsystem;
- Netlink;
- Network traffic control;
- SCTP protocol;
- TIPC protocol;
(CVE-2025-21971, CVE-2024-50237, CVE-2023-52927, CVE-2023-52458,
CVE-2021-47163
GHSA
GHSA-3975-hvrj-7hm8: An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc
ghsa_unreviewed·2022-02-10
CVE-2021-21971 [MEDIUM] CWE-787 GHSA-3975-hvrj-7hm8: An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc
An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
No detection rules found.
No public exploits indexed.
Talos
Vulnerability Spotlight: Multiple vulnerabilities in Sealevel SeaConnect
blogs_talos·2022-02-02·CVSS 8.1
[HIGH] Vulnerability Spotlight: Multiple vulnerabilities in Sealevel SeaConnect
## Vulnerability Spotlight: Multiple vulnerabilities in Sealevel SeaConnect
Francesco Benvenuto and Matt Wiseman of Cisco Talos discovered these vulnerabilities.
Update (Feb. 16, 2022): We are also disclosing a vulnerability in the Texas Instruments CC3200 SimpleLink microcontroller that is related to the SeaConnect vulnerabilities outlined in this post. For more on TALOS-2021-1393, read the full advisory here .
Cisco Talos recently discovered several vulnerabilities in Sealevel Systems Inc.’s SeaConnect internet-of-things edge device — many of which could allow an attacker to conduct a man-in-the-middle attack or execute remote code on the targeted device.
The SeaConnect 370W is a WiFi-connected edge device commonly used in industrial control system (ICS) environments that allow users
Talos
Vulnerability Spotlight: Multiple vulnerabilities in Sealevel SeaConnect
blogs_talos·2022-02-02·CVSS 8.1
[HIGH] Vulnerability Spotlight: Multiple vulnerabilities in Sealevel SeaConnect
Francesco Benvenuto and Matt Wiseman of Cisco Talos discovered these vulnerabilities.
Update (Feb. 16, 2022): We are also disclosing a vulnerability in the Texas Instruments CC3200 SimpleLink microcontroller that is related to the SeaConnect vulnerabilities outlined in this post. For more on TALOS-2021-1393, read the full advisory here.
Cisco Talos recently discovered several vulnerabilities in Sealevel Systems Inc.’s SeaConnect internet-of-things edge device — many of which could allow an attacker to conduct a man-in-the-middle attack or execute remote code on the targeted device.
The SeaConnect 370W is a WiFi-connected edge device commonly used in industrial control system (ICS) environments that allow users to remotely monitor and control the status of real-world I/O processes. This
2022-02-04
Published