How severe is CVE-2025-50398?

CVE-2025-50398 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-50398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-50398?

CVE-2025-50398 affects Mercurycom D196g Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-50398?

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

Does CVE-2025-50398 have an EU (EUVD) identifier?

Yes. CVE-2025-50398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203820.

When was CVE-2025-50398 published?

CVE-2025-50398 was published on 2025-12-16 and last updated on 2026-06-17.

CVE-2025-50398

CVE-2025-50398 is a critical-severity vulnerability in Mercurycom D196g Firmware with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203820
Weakness: CWE-120
Affected product: Mercurycom D196g Firmware
Published: 2025-12-16
Last modified: 2026-06-17

Description

Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter fac_password.

Frequently asked questions

What is CVE-2025-50398?: Mercury D196G d196gv1-cn-up_2020-01-09_11.21.44 is vulnerable to Buffer Overflow in the function sub_404CAEDC via the parameter fac_password.
How severe is CVE-2025-50398?: CVE-2025-50398 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-50398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-50398?: CVE-2025-50398 affects Mercurycom D196g Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-50398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-50398 have an EU (EUVD) identifier?: Yes. CVE-2025-50398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203820.
When was CVE-2025-50398 published?: CVE-2025-50398 was published on 2025-12-16 and last updated on 2026-06-17.

References

https://github.com/sezangel/IOT-vul/tree/main/Mercury/D196G/2

Affected products (1)

cpe:2.3:o:mercurycom:d196g_firmware:-:*:*:*:*:*:*:*

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