CVE-2025-1340: A vulnerability classified as critical has been found in TOTOLINK X18 9.1.0cu.2024_B20220329

This week

HIGH 8.8MITIGATE

CVE-2025-1340 is a high-severity flaw (CVSS 8.8) affecting x18 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
EPSS top 3%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	16.7% (top 3%)
CISA exploited list	No
Weakness	CWE-119, CWE-121, CWE-787
Published	2025-02-16
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: totolink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-02-16 14:15 UTCPublished CVE record published
2026-06-17 08:38 UTCUpdated Record last modified

totolink x18 firmware MITIGATE

Affected: 9.1.0cu.2024_b20220329

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.1.0cu.2024_b20220329

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-1340?

x18 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-1340 being exploited?

CVE-2025-1340 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-1340 affect?

CVE-2025-1340 affects x18 firmware. Severity is high (CVSS 8.8). 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.

How urgent is CVE-2025-1340?

Priority 55/100. High severity; EPSS top 3%: very likely to be exploited

Related CVEs

CVE-2025-61045 CRITICAL 9.8 MITIGATE TOTOLINK X18 V9.1.0cu.2053_B20230309 was discovered to contain a command injection vulnerability via the mac p
CVE-2025-61044 CRITICAL 9.8 MITIGATE TOTOLINK X18 V9.1.0cu.2053_B20230309 was discovered to contain a command injection vulnerability via the agent
CVE-2025-29209 CRITICAL 9.8 MITIGATE TOTOLINK X18 v9.1.0cu.2024_B20220329 has an unauthorized arbitrary command execution in the enable parameter'
CVE-2025-29064 CRITICAL 9.8 MITIGATE An issue in TOTOLINK x18 v.9.1.0cu.2024_B20220329 allows a remote attacker to execute arbitrary code via the s
CVE-2025-1829 MEDIUM 6.3 MITIGATE A vulnerability was found in TOTOLINK X18 9.1.0cu.2024_B20220329

References

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