** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the “setCookie” parameter in Zyxel NAS326…
Zyxel · NAS326 firmware
The command injection flaw in the "setCookie" parameter affects Zyxel NAS326 firmware before V5.21(AAZF.17)C0 and NAS542 firmware before V5.21(ABAG.14)C0. An unauthenticated remote attacker who sends a crafted HTTP POST request can execute some operating system commands, with no authentication or user interaction required.
** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the “setCookie” parameter in Zyxel NAS326 firmware versions before V5.21(AAZF.17)C0 and NAS542 firmware versions before V5.21(ABAG.14)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted HTTP POST request.
- Exploited
- Yes, in VulnCheck KEV
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 20 days after disclosure. Public exploit code (PoC-in-GitHub) appeared 15 days after disclosure.
- Disclosedday 0
- Public exploit codePoC-in-GitHub+15 days
- First seen exploitedVulnCheck KEV evidence+20 days
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Not named in any threat report yetAlso mentioned in 10 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Spam “Broken Seal” DocuSign-themed Delivery w/Fileless Process Hollowing (Zeppelin/Bloat-A) by msudosos22 Mar 2026
- Spam “Broken Seal” DocuSign-themed Delivery w/Fileless Process Hollowing (Zeppelin/Bloat-A) by msudosos22 Mar 2026
- CVE Data16 Feb 2026
- “Broken Seal” DocuSign-themed Delivery with Fileless Process Hollowing (Zeppelin/Bloat-A)13 Feb 2026
- Update 10: Cybercriminals Leverage 66 Vulnerabilities to Target Global Systems2 Jul 2025
- NCSC Advisory - 18th Sept 2024 - PRC Botnet14 Jan 2025
- 4 more on OTX