Exploitation Summary
EIP tracks 1 public exploit for EIP-2026-101505. PoCs published by Marco Ivaldi.
AI-analyzed exploit summary This is a working proof-of-concept exploit for CVE-2022-26531, targeting a format string vulnerability in the zysh binary on Zyxel devices. It leverages the 'ping' command to overwrite the GOT entry of fork() with a shellcode address, achieving remote code execution.
Description
Zyxel zysh - Format string
Exploits (1)
exploitdb
WORKING POC
by Marco Ivaldi · textremotehardware
https://www.exploit-db.com/exploits/51786
This is a working proof-of-concept exploit for CVE-2022-26531, targeting a format string vulnerability in the zysh binary on Zyxel devices. It leverages the 'ping' command to overwrite the GOT entry of fork() with a shellcode address, achieving remote code execution.
Classification
Working Poc 100%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target:
Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, VPN series firmware versions 4.30 through 5.21, NSG series firmware versions 1.00 through 1.33 Patch 4, NXC2500 firmware version 6.10(AAIG.3) and earlier versions, NAP203 firmware version 6.25(ABFA.7) and earlier versions, NWA50AX firmware version 6.25(ABYW.5) and earlier versions, WAC500 firmware version 6.30(ABVS.2) and earlier versions, and WAX510D firmware version 6.30(ABTF.2) and earlier versions
Auth required
Prerequisites:
Authenticated access to the zysh shell · SSH access to the target device
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026
Full analysis →
Details
Status
pre_cve
Tracked Since
Feb 18, 2026