CVE-2024-8882

Administrator-triggered service interruption via CGI buffer overflow

Published Nov 12, 2024 · Updated Nov 12, 2024

Buffer overflow in the CGI program in Zyxel GS1900-48 firmware V2.80(AAHN.1)C0 and earlier allows remote authenticated users to interrupt service. The CGI program mishandles an overlong value from a crafted URL and overruns a buffer; Zyxel has not identified the affected handler or parameter. Exploitation requires administrator credentials and LAN access, and no confidentiality or integrity impact is reported.

CVSS severity4.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the CGI program in Zyxel GS1900-48 firmware V2.80(AAHN.1)C0 and earlier allows remote authenticated users to interrupt service. The CGI program mishandles an overlong value from a crafted URL and overruns a buffer; Zyxel has not identified the affected handler or parameter. Exploitation requires administrator credentials and LAN access, and no confidentiality or integrity impact is reported.

The record

CVE
CVE-2024-8882
Published
Nov 12, 2024
Updated
Nov 12, 2024
Vendor
Zyxel Networks
Product
GS1900-48 Firmware
Classifications
CWE-120, T1499.004
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Nov 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= V2.80(AAHN.1)C0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Zyxel Networks · GS1900-48 Firmwareversion=<= V2.80(AAHN.1)C0

Published CVSS scores

4.5Zyxel CorporationCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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