How severe is CVE-2025-6138?

CVE-2025-6138 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-2025-6138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6138?

CVE-2025-6138 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6138?

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-2025-6138 have an EU (EUVD) identifier?

Yes. CVE-2025-6138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18434.

When was CVE-2025-6138 published?

CVE-2025-6138 was published on 2025-06-16 and last updated on 2026-06-17.

CVE-2025-6138

CVE-2025-6138 is a high-severity vulnerability in Totolink T10 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-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18434
Weakness: CWE-120
Affected product: Totolink T10 Firmware
Published: 2025-06-16
Last modified: 2026-06-17

Description

A vulnerability classified as critical was found in TOTOLINK T10 4.1.8cu.5207. Affected by this vulnerability is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ssid5g leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-6138?: A vulnerability classified as critical was found in TOTOLINK T10 4.1.8cu.5207. Affected by this vulnerability is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ssid5g leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-6138?: CVE-2025-6138 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-2025-6138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6138?: CVE-2025-6138 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6138?: 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-2025-6138 have an EU (EUVD) identifier?: Yes. CVE-2025-6138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18434.
When was CVE-2025-6138 published?: CVE-2025-6138 was published on 2025-06-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207:*:*:*:*:*:*:*

More vulnerabilities in Totolink T10 Firmware

CVE-2025-14964 — Critical (CVSS 9.8): A vulnerability has been found in TOTOLINK T10 4.1.8cu.5083_B20200521. This affects the function sprintf of the file…
CVE-2025-44655 — Critical (CVSS 9.8): In TOTOLink A7100RU V7.4, A950RG V5.9, and T10 V5.9, the chroot_local_user option is enabled in the vsftpd.conf. This…
CVE-2024-8162 — Critical (CVSS 9.8): A vulnerability classified as critical has been found in TOTOLINK T10 AC1200 4.1.8cu.5207. Affected is an unknown…
CVE-2022-25137 — Critical (CVSS 9.8): A command injection vulnerability in the function recvSlaveUpgstatus of TOTOLINK Technology routers T6 V3_Firmware…
CVE-2022-25136 — Critical (CVSS 9.8): A command injection vulnerability in the function meshSlaveUpdate of TOTOLINK Technology routers T6 V3_Firmware…
CVE-2022-25132 — Critical (CVSS 9.8): A command injection vulnerability in the function meshSlaveDlfw of TOTOLINK Technology router T6 V3_Firmware…

All CVEs affecting Totolink T10 Firmware →

Other CWE-120 (Classic Buffer Overflow) vulnerabilities

CVE-2025-48611 — Critical (CVSS 10.0): In DeviceId of DeviceId.java, there is a possible desync in persistence due to a missing bounds check. This could lead…
CVE-2026-24823 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in FASTSHIFT…
CVE-2026-24810 — Critical (CVSS 10.0): Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in rethinkdb (src/cjson modules).…
CVE-2026-24800 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in tildearrow…
CVE-2025-9962 — Critical (CVSS 10.0): A buffer overflow vulnerability in Novakon P series allows attackers to gain root permission without prior…
CVE-2010-10016 — Critical (CVSS 10.0): BS.Player version 2.57 (build 1051) contains a vulnerability in its playlist import functionality. When processing .m3u…

Browse all CWE-120 (Classic Buffer Overflow) vulnerabilities →