How severe is CVE-2025-4849?

CVE-2025-4849 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-4849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4849?

CVE-2025-4849 affects Totolink N300rh Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-4849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-4849 have an EU (EUVD) identifier?

Yes. CVE-2025-4849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15715.

When was CVE-2025-4849 published?

CVE-2025-4849 was published on 2025-05-18 and last updated on 2026-06-17.

CVE-2025-4849

CVE-2025-4849 is a medium-severity vulnerability in Totolink N300rh Firmware with a CVSS 3.x base score of 6.3. 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-77.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 5.3
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-15715
Weakness: CWE-77
Affected product: Totolink N300rh Firmware
Published: 2025-05-18
Last modified: 2026-06-17

Description

A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101. It has been rated as critical. Affected by this issue is the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument url leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-4849?: A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101. It has been rated as critical. Affected by this issue is the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument url leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-4849?: CVE-2025-4849 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-4849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4849?: CVE-2025-4849 affects Totolink N300rh Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-4849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4849 have an EU (EUVD) identifier?: Yes. CVE-2025-4849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15715.
When was CVE-2025-4849 published?: CVE-2025-4849 was published on 2025-05-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:n300rh_firmware:6.1c.1390_b20191101:*:*:*:*:*:*:*

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