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CVE-2026-4497— Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection

Quick assessment

Affected
Totolink WA300
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TOTOLINK WA300是中国吉翁电子（TOTOLINK）公司的一款无线接入点。 TOTOLINK WA300 5.2cu.7112_B20190227版本存在操作系统命令注入漏洞，该漏洞源于文件/cgi-bin/cstecgi.cgi中函数recvUpgradeNewFw存在os命令注入，可能导致远程执行任意代码。

CVSS 7.3 · High EPSS 2.88% · P86
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I. Basic Information for CVE-2026-4497

Vulnerability Information
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Vulnerability Title
Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK WA300 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK WA300是中国吉翁电子（TOTOLINK）公司的一款无线接入点。 TOTOLINK WA300 5.2cu.7112_B20190227版本存在操作系统命令注入漏洞，该漏洞源于文件/cgi-bin/cstecgi.cgi中函数recvUpgradeNewFw存在os命令注入，可能导致远程执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Totolink WA300 5.2cu.7112_B20190227 cpe:2.3:o:totolink:wa300_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4497

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9114 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-4497

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Vendor Advisories for CVE-2026-4497 (2)

Other References for CVE-2026-4497 (1)

Other References for CVE-2026-4497 (1)

IV. Related Vulnerabilities

Same product: WA300
Same vendor: Totolink
Same weakness: CWE-78

V. Comments for CVE-2026-4497

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