SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityDeferred

CVE-2026-43853

A vulnerability could allow an attacker to send a crafted message to trigger an assertion fault, causing the service to crash.

HIGH 8.2EPSS 0.40%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability could allow an attacker to send a crafted message to trigger an assertion fault, causing the service to crash.

CVSS 4.0
8.2 HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS
0.40% probability · 34th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-617
Source
5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
EPSS trend
0%3%5%20 October 2026: 0.43%26 October 2026: 0.40%20 October 202626 October 2026

EPSS moved from 0.4% on 20 October 2026 to 0.4% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.