CVE-2026-27816 is a critical out-of-bounds write vulnerability (CWE-787) affecting EVerest, an EV charging software stack, in versions prior to 2026.02.0. This flaw allows attackers to trigger an out-of-bounds write by sending oversized MQTT Cmd payloads, particularly when default schema validation is disabled. Rated 9.1 Critical (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H), it is remotely exploitable with low attack complexity and no user interaction or privileges required, potentially leading to corruption of adjacent EVSE state or process crashes. There is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2026.02.0CPE matchmatch criteria | cpe:2.3:o:linuxfoundation:everest:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.