How severe is CVE-2023-7220?

CVE-2023-7220 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-2023-7220 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-2023-7220?

CVE-2023-7220 affects Totolink Nr1800x Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-7220?

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-2023-7220 have an EU (EUVD) identifier?

Yes. CVE-2023-7220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59401.

When was CVE-2023-7220 published?

CVE-2023-7220 was published on 2024-01-09 and last updated on 2026-06-17.

CVE-2023-7220

CVE-2023-7220 is a critical-severity vulnerability in Totolink Nr1800x 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-59401
Weakness: CWE-121
Affected product: Totolink Nr1800x Firmware
Published: 2024-01-09
Last modified: 2026-06-17

Description

A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2023-7220?: A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2023-7220?: CVE-2023-7220 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-2023-7220 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-2023-7220?: CVE-2023-7220 affects Totolink Nr1800x Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-7220?: 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-2023-7220 have an EU (EUVD) identifier?: Yes. CVE-2023-7220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59401.
When was CVE-2023-7220 published?: CVE-2023-7220 was published on 2024-01-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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