How severe is CVE-2026-25857?

CVE-2026-25857 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-2026-25857 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25857?

CVE-2026-25857 affects Tenda G300-f Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25857?

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-2026-25857 have an EU (EUVD) identifier?

Yes. CVE-2026-25857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5714.

When was CVE-2026-25857 published?

CVE-2026-25857 was published on 2026-02-07 and last updated on 2026-06-17.

CVE-2026-25857

CVE-2026-25857 is a high-severity vulnerability in Tenda G300-f 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.6
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5714
Weakness: CWE-78
Affected product: Tenda G300-f Firmware
Published: 2026-02-07
Last modified: 2026-06-17

Description

Tenda G300-F router firmware version 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process.

Frequently asked questions

What is CVE-2026-25857?: Tenda G300-F router firmware version 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process.
How severe is CVE-2026-25857?: CVE-2026-25857 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-2026-25857 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25857?: CVE-2026-25857 affects Tenda G300-f Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25857?: 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-2026-25857 have an EU (EUVD) identifier?: Yes. CVE-2026-25857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5714.
When was CVE-2026-25857 published?: CVE-2026-25857 was published on 2026-02-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:g300-f_firmware:*:*:*:*:*:*:*:*

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