How serious is CVE-2026-2557?

This vulnerability has a CVSS score of 5.1 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-2557?

Yes, proof-of-concept exploit code for CVE-2026-2557 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-2557?

CVE-2026-2557 affects cskefu cskefu. Check the full CVE details for specific version information.

How do I fix CVE-2026-2557?

To remediate CVE-2026-2557, check for security patches from cskefu. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-2557

Medium

|5.1

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to inject malicious scripts into the cskefu application, which can then be executed in the browsers of users who visit affected pages. The attack can be carried out remotely, meaning the attacker doesn't need physical access to the system, and it affects versions up to 8.0.1.

Technical Description

A vulnerability was detected in cskefu up to 8.0.1. Impacted is the function Upload of the file com/cskefu/cc/controller/resource/MediaController.java of the component File Upload. The manipulation results in cross site scripting. The attack may be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$690($500-$1K)

Vendor Response

Grade APatched in 4 days

Quick Information

Published

Feb 16, 2026

about 2 months ago

Last Modified

Feb 20, 2026

about 2 months ago

Vendor

cskefu

Product

cskefu

Related Vulnerabilities

CVE-2026-2556Medium

This vulnerability allows an attacker to trick the server into making unauthorized requests to other internal systems, potentially exposing sensitive information. It can be exploited remotely without needing direct access to the server, making it a significant risk for users of the affected software version.