How severe is CVE-2026-26201?

CVE-2026-26201 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-26201 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26201?

CVE-2026-26201 affects Jm33-m0 Emp3r0r. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26201?

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.

Does CVE-2026-26201 have an EU (EUVD) identifier?

Yes. CVE-2026-26201 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7978.

When was CVE-2026-26201 published?

CVE-2026-26201 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2026-26201

CVE-2026-26201 is a high-severity vulnerability in Jm33-m0 Emp3r0r with a CVSS 3.x base score of 7.5. 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-362.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.0
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7978
Weakness: CWE-362
Affected product: Jm33-m0 Emp3r0r
Published: 2026-02-19
Last modified: 2026-06-17

Description

emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 3.21.2, multiple shared maps are accessed without consistent synchronization across goroutines. Under concurrent activity, Go runtime can trigger `fatal error: concurrent map read and map write`, causing C2 process crash (availability loss). Version 3.21.2 fixes this issue.

Frequently asked questions

What is CVE-2026-26201?: emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 3.21.2, multiple shared maps are accessed without consistent synchronization across goroutines. Under concurrent activity, Go runtime can trigger `fatal error: concurrent map read and map write`, causing C2 process crash (availability loss). Version 3.21.2 fixes this issue.
How severe is CVE-2026-26201?: CVE-2026-26201 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-26201 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26201?: CVE-2026-26201 affects Jm33-m0 Emp3r0r. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26201?: 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.
Does CVE-2026-26201 have an EU (EUVD) identifier?: Yes. CVE-2026-26201 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7978.
When was CVE-2026-26201 published?: CVE-2026-26201 was published on 2026-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jm33-m0:emp3r0r:*:*:*:*:*:*:*:*

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