How severe is CVE-2026-5030?

CVE-2026-5030 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-2026-5030 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5030?

CVE-2026-5030 affects Totolink Nr1800x Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5030?

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

Does CVE-2026-5030 have an EU (EUVD) identifier?

Yes. CVE-2026-5030 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16971.

When was CVE-2026-5030 published?

CVE-2026-5030 was published on 2026-03-29 and last updated on 2026-06-17.

CVE-2026-5030

CVE-2026-5030 is a medium-severity vulnerability in Totolink Nr1800x 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: 2.1
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16971
Weakness: CWE-77
Affected product: Totolink Nr1800x Firmware
Published: 2026-03-29
Last modified: 2026-06-17

Description

A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2026-5030?: A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-5030?: CVE-2026-5030 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-2026-5030 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5030?: CVE-2026-5030 affects Totolink Nr1800x Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5030?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5030 have an EU (EUVD) identifier?: Yes. CVE-2026-5030 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16971.
When was CVE-2026-5030 published?: CVE-2026-5030 was published on 2026-03-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:nr1800x_firmware:9.1.0u.6279_b20210910:*:*:*:*:*:*:*

More vulnerabilities in Totolink Nr1800x Firmware

CVE-2025-45841 — Critical (CVSS 9.8): TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the text…
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CVE-2022-41522 — Critical (CVSS 9.8): TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an unauthenticated stack overflow via the "main"…
CVE-2022-41518 — Critical (CVSS 9.8): TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a command injection vulnerability via the…

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