How severe is CVE-2025-70998?

CVE-2025-70998 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-2025-70998 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-70998?

CVE-2025-70998 affects Utt 810 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-70998?

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-2025-70998 have an EU (EUVD) identifier?

Yes. CVE-2025-70998 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207779.

When was CVE-2025-70998 published?

CVE-2025-70998 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2025-70998

CVE-2025-70998 is a critical-severity vulnerability in Utt 810 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-1188.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207779
Weakness: CWE-1188
Affected product: Utt 810 Firmware
Published: 2026-02-18
Last modified: 2026-06-17

Description

UTT HiPER 810 / nv810v4 router firmware v1.5.0-140603 was discovered to contain insecure default credentials for the telnet service, possibly allowing a remote attacker to gain root access via a crafted script.

Frequently asked questions

What is CVE-2025-70998?: UTT HiPER 810 / nv810v4 router firmware v1.5.0-140603 was discovered to contain insecure default credentials for the telnet service, possibly allowing a remote attacker to gain root access via a crafted script.
How severe is CVE-2025-70998?: CVE-2025-70998 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-2025-70998 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-70998?: CVE-2025-70998 affects Utt 810 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-70998?: 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-2025-70998 have an EU (EUVD) identifier?: Yes. CVE-2025-70998 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207779.
When was CVE-2025-70998 published?: CVE-2025-70998 was published on 2026-02-18 and last updated on 2026-06-17.

References

https://github.com/cha0yang1/UTT-nv810v4-telnet-backdoor

Affected products (1)

cpe:2.3:o:utt:810_firmware:1.5.0-140603:*:*:*:*:*:*:*

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