CVEFinder.io

CVE-2026-7273

⚠️ high
Summary

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

CVSS Score
8.8
High
EPSS Score
-
Published Date
2026-06-16
First Seen: 2026-06-17
📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 80.8% of all 365,968 vulnerabilities in our database.

#70,121
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jun 17, 2026
🔍 Exploitation Status
Active
Exploits detected in the wild
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by CISA
Last Modified 2026-09-22
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-121

📦 Affected Products 10

Vendor Product Status Affected Versions
zyxel gs1900-10hp_firmware Affected
< 2.90\(aazi.2\)c0
zyxel gs1900-16_firmware Affected
< 2.90\(aahj.2\)c0
zyxel gs1900-24_firmware Affected
< 2.90\(aahl.2\)c0
zyxel gs1900-24e_firmware Affected
< 2.90\(aahk.2\)c0
zyxel gs1900-48_firmware Affected
< 2.90\(aahn.2\)c0
zyxel gs1900-8_firmware Affected
< 2.90\(aahh.2\)c0
zyxel gs1900-8hp_firmware Affected
< 2.90\(aahi.2\)c0
zyxel gs1900-24ep_firmware Affected
< 2.90\(abto.2\)c0
zyxel gs1900-24hpv2_firmware Affected
< 2.90\(abtp.2\)c0
zyxel gs1900-48hpv2_firmware Affected
< 2.90\(abtq.2\)c0

🔗 References 3

https://www.zyxel.com/global/en/support/security-adv...
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities...
Third Party Advisory US Government Resource
https://www.greynoise.io/blog/open-season-on-kapibal...
Exploit Third Party Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2024-8881 🔶 medium 6.8 0.1 A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version ... 2024-11-12
CVE-2024-8882 🔶 medium 4.5 0.1 A buffer overflow vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1)C0 and ea... 2024-11-12
CVE-2024-38270 🔶 medium 5.3 0.2 An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authe... 2024-09-10
CVE-2023-35140 🔶 medium 5.5 0.1 The improper privilege management vulnerability in the Zyxel GS1900-24EP switch firmware version V2.70(ABTO.5) could al... 2023-11-07
CVE-2022-45853 🔶 medium 6.7 0.0 The privilege escalation vulnerability in the Zyxel GS1900-8 firmware version V2.70(AAHH.3) and the GS1900-8HP firmwa... 2023-05-30
CVE-2022-34746 🔶 medium 5.9 0.3 An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key pair... 2022-09-20
These CVEs affect the same products