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CVE-2021-21971

LOW
Published 2022-02-04T22:29:02.000Z
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Expert Analysis

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CVSS Score

V3.0
3.7
/10
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.601
Higher than 60.1% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
LOW
Availability
NONE

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-3975-hvrj-7hm8

Advisory Details

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.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-21971
WEB https://talosintelligence.com/vulnerability_reports/TALOS-2021-1397
WEB https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406

Advisory provided by GitHub Security Advisory Database. Published: February 10, 2022, Modified: April 20, 2022

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406
Published: 2022-02-04T22:29:02.000Z
Last Modified: 2025-04-15T19:11:19.375Z
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