CVE-2026-42800

Deference after null check in ims_client sip

MEDIUM
5.3
CVSS Score
Published: April 30, 2026 at 08:52 AM UTC
Updated: October 26, 2026 at 09:10 PM UTC
2 products affected across 1 vendorASR1901 FirmwareASR1903 Firmware· also runs on 2 platforms

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.225.003
asrmicro-asr1901 (same device)
v < 1.225.003
asrmicro-asr1903 (same device)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

Vendor Advisory
Source: cverecord
https://www.asrmicro.com/en/goods/psirt?cid=44

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476

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