How severe is CVE-2025-28138?

CVE-2025-28138 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-2025-28138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-28138?

CVE-2025-28138 affects Totolink A800r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-28138?

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-2025-28138 have an EU (EUVD) identifier?

Yes. CVE-2025-28138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8646.

When was CVE-2025-28138 published?

CVE-2025-28138 was published on 2025-03-27 and last updated on 2026-06-17.

CVE-2025-28138

CVE-2025-28138 is a critical-severity vulnerability in Totolink A800r 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8646
Weakness: CWE-78
Affected product: Totolink A800r Firmware
Published: 2025-03-27
Last modified: 2026-06-17

Description

The TOTOLINK A800R V4.1.2cu.5137_B20200730 were found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter.

Frequently asked questions

What is CVE-2025-28138?: The TOTOLINK A800R V4.1.2cu.5137_B20200730 were found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter.
How severe is CVE-2025-28138?: CVE-2025-28138 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-2025-28138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-28138?: CVE-2025-28138 affects Totolink A800r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-28138?: 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-2025-28138 have an EU (EUVD) identifier?: Yes. CVE-2025-28138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8646.
When was CVE-2025-28138 published?: CVE-2025-28138 was published on 2025-03-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a800r_firmware:4.1.2cu.5137_b20200730:*:*:*:*:*:*:*

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