How severe is CVE-2025-5600?

CVE-2025-5600 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-2025-5600 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5600?

CVE-2025-5600 affects Totolink Ex1200t Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-5600?

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-2025-5600 have an EU (EUVD) identifier?

Yes. CVE-2025-5600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16902.

When was CVE-2025-5600 published?

CVE-2025-5600 was published on 2025-06-04 and last updated on 2026-06-17.

CVE-2025-5600

CVE-2025-5600 is a critical-severity vulnerability in Totolink Ex1200t 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
CVSS v4: 9.3
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16902
Weakness: CWE-787
Affected product: Totolink Ex1200t Firmware
Published: 2025-06-04
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument LangType leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-5600?: A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument LangType leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-5600?: CVE-2025-5600 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-2025-5600 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5600?: CVE-2025-5600 affects Totolink Ex1200t Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-5600?: 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-2025-5600 have an EU (EUVD) identifier?: Yes. CVE-2025-5600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16902.
When was CVE-2025-5600 published?: CVE-2025-5600 was published on 2025-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5232_b20210713:*:*:*:*:*:*:*

More vulnerabilities in Totolink Ex1200t Firmware

CVE-2025-51451 — Critical (CVSS 9.8): In TOTOLINK EX1200T firmware 4.1.2cu.5215, an attacker can bypass login by sending a specific request through…
CVE-2025-28039 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the…
CVE-2025-28038 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the…
CVE-2023-52032 — Critical (CVSS 9.8): TOTOlink EX1200T V4.1.2cu.5232_B20210713 was discovered to contain a remote command execution (RCE) vulnerability via…
CVE-2021-42890 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function NTPSyncWithHost of the…
CVE-2021-42888 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function setLanguageCfg of the file…

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