How severe is CVE-2021-26751?

CVE-2021-26751 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-2021-26751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26751?

CVE-2021-26751 affects Nedi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26751?

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.

When was CVE-2021-26751 published?

CVE-2021-26751 was published on 2021-02-12 and last updated on 2026-06-17.

CVE-2021-26751

CVE-2021-26751 is a high-severity vulnerability in Nedi 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-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 4.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Nedi
Published: 2021-02-12
Last modified: 2026-06-17

Description

NeDi 1.9C allows an authenticated user to perform a SQL Injection in the Monitoring History function on the endpoint /Monitoring-History.php via the det HTTP GET parameter. This allows an attacker to access all the data in the database and obtain access to the NeDi application.

Frequently asked questions

What is CVE-2021-26751?: NeDi 1.9C allows an authenticated user to perform a SQL Injection in the Monitoring History function on the endpoint /Monitoring-History.php via the det HTTP GET parameter. This allows an attacker to access all the data in the database and obtain access to the NeDi application.
How severe is CVE-2021-26751?: CVE-2021-26751 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-2021-26751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26751?: CVE-2021-26751 affects Nedi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26751?: 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.
When was CVE-2021-26751 published?: CVE-2021-26751 was published on 2021-02-12 and last updated on 2026-06-17.

References

https://n4nj0.github.io/advisories/nedi-multiple-vulnerabilities-i/

Affected products (1)

cpe:2.3:a:nedi:nedi:1.9c:*:*:*:*:*:*:*

More vulnerabilities in Nedi

CVE-2021-26753 — Critical (CVSS 9.9): NeDi 1.9C allows an authenticated user to inject PHP code in the System Files function on the endpoint…
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CVE-2021-26752 — High (CVSS 8.8): NeDi 1.9C allows an authenticated user to execute operating system commands in the Nodes Traffic function on the…
CVE-2020-14414 — High (CVSS 8.8): NeDi 1.9C is vulnerable to Remote Command Execution. pwsec.php improperly escapes shell metacharacters from a POST…
CVE-2020-14412 — High (CVSS 8.8): NeDi 1.9C is vulnerable to Remote Command Execution. System-Snapshot.php improperly escapes shell metacharacters from a…
CVE-2018-20728 — High (CVSS 8.8): A cross site request forgery (CSRF) vulnerability in NeDi before 1.7Cp3 allows remote attackers to escalate privileges…

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