How severe is CVE-2026-42799?

CVE-2026-42799 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-42799 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42799?

CVE-2026-42799 affects Asrmicro Asr1803 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42799?

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-2026-42799 have an EU (EUVD) identifier?

Yes. CVE-2026-42799 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26358.

When was CVE-2026-42799 published?

CVE-2026-42799 was published on 2026-04-30 and last updated on 2026-06-17.

CVE-2026-42799

CVE-2026-42799 is a high-severity vulnerability in Asrmicro Asr1803 Firmware with a CVSS 3.x base score of 7.4. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26358
Weakness: CWE-125
Affected product: Asrmicro Asr1803 Firmware
Published: 2026-04-30
Last modified: 2026-06-17

Description

Out-of-bounds read vulnerability in ASR Kestrel (nr_fw modules) allows Overflow Buffers. This vulnerability is associated with program files Code/Nr/nr_fw/RA/src/NrPwrCtrl.C. This issue affects Kestrel: before 2026/02/10.

Frequently asked questions

What is CVE-2026-42799?: Out-of-bounds read vulnerability in ASR Kestrel (nr_fw modules) allows Overflow Buffers. This vulnerability is associated with program files Code/Nr/nr_fw/RA/src/NrPwrCtrl.C. This issue affects Kestrel: before 2026/02/10.
How severe is CVE-2026-42799?: CVE-2026-42799 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-42799 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42799?: CVE-2026-42799 affects Asrmicro Asr1803 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42799?: 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-2026-42799 have an EU (EUVD) identifier?: Yes. CVE-2026-42799 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26358.
When was CVE-2026-42799 published?: CVE-2026-42799 was published on 2026-04-30 and last updated on 2026-06-17.

References

https://www.asrmicro.com/en/goods/psirt?cid=44

Affected products (1)

cpe:2.3:o:asrmicro:asr1803_firmware:*:*:*:*:*:*:*:*

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