How severe is CVE-2025-1340?

CVE-2025-1340 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-2025-1340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-1340?

CVE-2025-1340 affects Totolink X18 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-1340?

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-2025-1340 have an EU (EUVD) identifier?

Yes. CVE-2025-1340 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2111.

When was CVE-2025-1340 published?

CVE-2025-1340 was published on 2025-02-16 and last updated on 2026-06-17.

CVE-2025-1340

CVE-2025-1340 is a high-severity vulnerability in Totolink X18 Firmware with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 8.7
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2111
Weakness: CWE-119
Affected product: Totolink X18 Firmware
Published: 2025-02-16
Last modified: 2026-06-17

Description

A vulnerability classified as critical has been found in TOTOLINK X18 9.1.0cu.2024_B20220329. Affected is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi. The manipulation as part of String leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2025-1340?: A vulnerability classified as critical has been found in TOTOLINK X18 9.1.0cu.2024_B20220329. Affected is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi. The manipulation as part of String leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-1340?: CVE-2025-1340 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-2025-1340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-1340?: CVE-2025-1340 affects Totolink X18 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-1340?: 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-2025-1340 have an EU (EUVD) identifier?: Yes. CVE-2025-1340 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2111.
When was CVE-2025-1340 published?: CVE-2025-1340 was published on 2025-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:x18_firmware:9.1.0cu.2024_b20220329:*:*:*:*:*:*:*

More vulnerabilities in Totolink X18 Firmware

CVE-2025-61045 — Critical (CVSS 9.8): TOTOLINK X18 V9.1.0cu.2053_B20230309 was discovered to contain a command injection vulnerability via the mac parameter…
CVE-2025-61044 — Critical (CVSS 9.8): TOTOLINK X18 V9.1.0cu.2053_B20230309 was discovered to contain a command injection vulnerability via the agentName…
CVE-2025-29209 — Critical (CVSS 9.8): TOTOLINK X18 v9.1.0cu.2024_B20220329 has an unauthorized arbitrary command execution in the enable parameter' of the…
CVE-2025-29064 — Critical (CVSS 9.8): An issue in TOTOLINK x18 v.9.1.0cu.2024_B20220329 allows a remote attacker to execute arbitrary code via the sub_410E54…
CVE-2023-29803 — Critical (CVSS 9.8): TOTOLINK X18 V9.1.0cu.2024_B20220329 was discovered to contain a command injection vulnerability via the pid parameter…
CVE-2023-29802 — Critical (CVSS 9.8): TOTOLINK X18 V9.1.0cu.2024_B20220329 was discovered to contain a command injection vulnerability via the ip parameter…

All CVEs affecting Totolink X18 Firmware →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →