PatchTheCVECVE-2026-42800: NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Po
CVE-2026-42800 is a high-severity flaw (CVSS 7.4) affecting asr1901 firmware, asr1903 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.4 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-476 |
| Published | 2026-04-30 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-42800?
asr1901 firmware: upgrade to 1.225.003; asr1903 firmware: upgrade to 1.225.003. Exact commands for each OS are on this page.
Is CVE-2026-42800 being exploited?
CVE-2026-42800 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-42800 affect?
CVE-2026-42800 affects asr1901 firmware, asr1903 firmware. Severity is high (CVSS 7.4). 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 urgent is CVE-2026-42800?
Priority 35/100. High severity; On your watchlist