How severe is CVE-2026-42800?

CVE-2026-42800 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-2026-42800 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42800?

CVE-2026-42800 primarily affects Asrmicro Asr1901 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42800?

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-2026-42800 have an EU (EUVD) identifier?

Yes. CVE-2026-42800 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26360.

When was CVE-2026-42800 published?

CVE-2026-42800 was published on 2026-04-30 and last updated on 2026-06-17.

CVE-2026-42800

CVE-2026-42800 is a high-severity vulnerability in Asrmicro Asr1901 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26360
Weakness: CWE-476
Affected product: Asrmicro Asr1901 Firmware
Published: 2026-04-30
Last modified: 2026-06-17

Description

NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Pointer Manipulation. This vulnerability is associated with program files sip/utils/src/sipuri.c.

Frequently asked questions

What is CVE-2026-42800?: NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Pointer Manipulation. This vulnerability is associated with program files sip/utils/src/sipuri.c.
How severe is CVE-2026-42800?: CVE-2026-42800 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-2026-42800 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42800?: CVE-2026-42800 primarily affects Asrmicro Asr1901 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42800?: 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-2026-42800 have an EU (EUVD) identifier?: Yes. CVE-2026-42800 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26360.
When was CVE-2026-42800 published?: CVE-2026-42800 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 (2)

cpe:2.3:o:asrmicro:asr1901_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:asrmicro:asr1903_firmware:*:*:*:*:*:*:*:*

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