How severe is CVE-2025-6733?

CVE-2025-6733 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-6733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6733?

CVE-2025-6733 affects Utt 840g Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6733?

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-2025-6733 have an EU (EUVD) identifier?

Yes. CVE-2025-6733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19245.

When was CVE-2025-6733 published?

CVE-2025-6733 was published on 2025-06-26 and last updated on 2026-06-17.

CVE-2025-6733

CVE-2025-6733 is a high-severity vulnerability in Utt 840g Firmware with a CVSS 3.x base score of 8.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19245
Weakness: CWE-119
Affected product: Utt 840g Firmware
Published: 2025-06-26
Last modified: 2026-06-17

Description

A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been declared as critical. This vulnerability affects the function sub_416928 of the file /goform/formConfigDnsFilterGlobal of the component API. The manipulation of the argument GroupName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2025-6733?: A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been declared as critical. This vulnerability affects the function sub_416928 of the file /goform/formConfigDnsFilterGlobal of the component API. The manipulation of the argument GroupName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-6733?: CVE-2025-6733 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-6733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6733?: CVE-2025-6733 affects Utt 840g Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6733?: 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-2025-6733 have an EU (EUVD) identifier?: Yes. CVE-2025-6733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19245.
When was CVE-2025-6733 published?: CVE-2025-6733 was published on 2025-06-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:utt:840g_firmware:*:*:*:*:*:*:*:*

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