How severe is CVE-2025-45790?

CVE-2025-45790 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-2025-45790 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-45790?

CVE-2025-45790 affects Totolink A3100r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-45790?

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-2025-45790 have an EU (EUVD) identifier?

Yes. CVE-2025-45790 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14037.

When was CVE-2025-45790 published?

CVE-2025-45790 was published on 2025-05-08 and last updated on 2026-06-17.

CVE-2025-45790

CVE-2025-45790 is a critical-severity vulnerability in Totolink A3100r 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14037
Weakness: CWE-787
Affected product: Totolink A3100r Firmware
Published: 2025-05-08
Last modified: 2026-06-17

Description

TOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the priority parameter in the setMacQos interface of /lib/cste_modules/firewall.so.

Frequently asked questions

What is CVE-2025-45790?: TOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the priority parameter in the setMacQos interface of /lib/cste_modules/firewall.so.
How severe is CVE-2025-45790?: CVE-2025-45790 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-2025-45790 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-45790?: CVE-2025-45790 affects Totolink A3100r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-45790?: 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-2025-45790 have an EU (EUVD) identifier?: Yes. CVE-2025-45790 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14037.
When was CVE-2025-45790 published?: CVE-2025-45790 was published on 2025-05-08 and last updated on 2026-06-17.

References

https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3100R-4/README.md

Affected products (1)

cpe:2.3:o:totolink:a3100r_firmware:5.9c.1527:*:*:*:*:*:*:*

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