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CVE-2026-42800— Deference after null check in ims_client sip

Quick assessment

Affected
ASR Lapwing_Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ASR Lapwing_Linux是中国翱捷（ASR）公司的一个设备固件。 ASR Lapwing_Linux存在代码问题漏洞，该漏洞源于ims_client模块存在空指针取消引用，可能导致指针操作。

CVSS 7.4 · High EPSS 0.29% · P19

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 1

VendorProduct Version RangeStatus
ASR Lapwing_Linux < 2026/4/14 unaffected
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I. Basic Information for CVE-2026-42800

Vulnerability Information
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Vulnerability Title
Deference after null check in ims_client sip
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
ASR Lapwing_Linux 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ASR Lapwing_Linux是中国翱捷（ASR）公司的一个设备固件。 ASR Lapwing_Linux存在代码问题漏洞，该漏洞源于ims_client模块存在空指针取消引用，可能导致指针操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ASR Lapwing_Linux - -

II. Public POCs for CVE-2026-42800

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III. Intelligence Information for CVE-2026-42800

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Vendor Pages for CVE-2026-42800 (1)

IV. Related Vulnerabilities

Same product: Lapwing_Linux
Same vendor: ASR
Same weakness: CWE-476

V. Comments for CVE-2026-42800

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