How severe is CVE-2025-20637?

CVE-2025-20637 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-20637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20637?

CVE-2025-20637 affects Mediatek Software Development Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-20637?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-20637 have an EU (EUVD) identifier?

Yes. CVE-2025-20637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2187.

When was CVE-2025-20637 published?

CVE-2025-20637 was published on 2025-02-03 and last updated on 2026-06-17.

CVE-2025-20637

CVE-2025-20637 is a high-severity vulnerability in Mediatek Software Development Kit with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-754.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2187
Weakness: CWE-754
Affected product: Mediatek Software Development Kit
Published: 2025-02-03
Last modified: 2026-06-17

Description

In network HW, there is a possible system hang due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00399035; Issue ID: MSV-2380.

Frequently asked questions

What is CVE-2025-20637?: In network HW, there is a possible system hang due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00399035; Issue ID: MSV-2380.
How severe is CVE-2025-20637?: CVE-2025-20637 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-20637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20637?: CVE-2025-20637 affects Mediatek Software Development Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-20637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-20637 have an EU (EUVD) identifier?: Yes. CVE-2025-20637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2187.
When was CVE-2025-20637 published?: CVE-2025-20637 was published on 2025-02-03 and last updated on 2026-06-17.

References

https://corp.mediatek.com/product-security-bulletin/February-2025

Affected products (1)

cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:*

More vulnerabilities in Mediatek Software Development Kit

CVE-2025-20684 — Critical (CVSS 9.8): In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local…
CVE-2025-20683 — Critical (CVSS 9.8): In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local…
CVE-2025-20682 — Critical (CVSS 9.8): In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local…
CVE-2025-20681 — Critical (CVSS 9.8): In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local…
CVE-2025-20674 — Critical (CVSS 9.8): In wlan AP driver, there is a possible way to inject arbitrary packet due to a missing permission check. This could…
CVE-2025-20654 — Critical (CVSS 9.8): In wlan service, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote…

All CVEs affecting Mediatek Software Development Kit →

Other CWE-754 (Improper Check for Unusual or Exceptional Conditions) vulnerabilities

CVE-2026-24054 — Critical (CVSS 10.0): Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs)…
CVE-2021-0211 — Critical (CVSS 10.0): An improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved Routing…
CVE-2026-8091 — Critical (CVSS 9.8): Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150,…
CVE-2024-52316 — Critical (CVSS 9.8): Unchecked Error Condition vulnerability in Apache Tomcat. If Tomcat is configured to use a custom Jakarta…
CVE-2024-7826 — Critical (CVSS 9.8): Improper Check for Unusual or Exceptional Conditions vulnerability in Webroot SecureAnywhere - Web Shield on Windows,…
CVE-2023-37303 — Critical (CVSS 9.8): An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In certain situations, an attempt to…

Browse all CWE-754 (Improper Check for Unusual or Exceptional Conditions) vulnerabilities →