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Vulnerabilities

Vulnerability · CVE-2026-42800

NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Pointer Manipulation.

Published Apr 30, 2026 · catalog updated Jun 17, 2026 · asr1901 firmware

Check if you run it

No confirmed exploitation is on record for CVE-2026-42800. EPSS is 0.29%. Act only if a listed version of asr1901 firmware is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Advisory link
Affected products
cpe asrmicro/asr1901 firmware · cpe asrmicro/asr1903 firmware

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe asrmicro/asr1901 firmwareversion unspecified
  • cpe asrmicro/asr1903 firmwareversion unspecified

How to fix CVE-2026-42800

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-42800. EPSS is 0.29%. Act only if a listed version of asr1901 firmware is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 30, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-42800

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-42800

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.