How severe is CVE-2026-2449?

CVE-2026-2449 has a CVSS 4.0 base score of 9.0, rated critical severity.

Is CVE-2026-2449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-2449?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-2449 have an EU (EUVD) identifier?

Yes. CVE-2026-2449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22248.

When was CVE-2026-2449 published?

CVE-2026-2449 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-2449

CVE-2026-2449 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.0. 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-88.

Key facts

Severity: Critical (CVSS 4.0 base score 9.0)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22248
Weakness: CWE-88
Published: 2026-04-14
Last modified: 2026-06-17

Description

Improper neutralization of argument delimiters in a command ('argument injection') vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Hijacking a Privileged Thread of Execution.This issue affects upKeeper Instant Privilege Access: through 1.5.0.

Frequently asked questions

What is CVE-2026-2449?: Improper neutralization of argument delimiters in a command ('argument injection') vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Hijacking a Privileged Thread of Execution.This issue affects upKeeper Instant Privilege Access: through 1.5.0.
How severe is CVE-2026-2449?: CVE-2026-2449 has a CVSS 4.0 base score of 9.0, rated critical severity.
Is CVE-2026-2449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-2449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-2449 have an EU (EUVD) identifier?: Yes. CVE-2026-2449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22248.
When was CVE-2026-2449 published?: CVE-2026-2449 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://support.upkeeper.se/hc/en-us/articles/26783425404444-CVE-2026-2449-Improper-neutralization-of-argument-delimiters-in-a-command

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