Is CVE-2026-26282 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-26282, but active exploitation has not been confirmed.

Can CVE-2026-26282 be exploited remotely?

No. CVE-2026-26282 requires local access to exploit.

What is the CVSS score of CVE-2026-26282?

CVE-2026-26282 has a CVSS score of 6.6 (MEDIUM) and an EPSS exploitation probability of 0.02%.

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MEDIUMPOC

CVE-2026-26282

CWE-126Published: February 19, 2026· Updated: Feb 20, 2026

6.6

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:6.3th

Official Description

NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an out-of-bounds heap read in `.NET Single File` bundle header parser due to missing bounds check. Opening a crafted file with NanaZip causes a crash or leaks heap data to the user. Version 6.0.1630.0 patches the issue.

NVD Source

Technical Analysis

CVE-2026-26282 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 6.6.

A proof-of-concept (PoC) exploit exists for CVE-2026-26282. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.