Vulnerability · CVE-2026-5020
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102.
Published Mar 29, 2026 · catalog updated Jun 17, 2026 · a3600r firmware
Check if you run it
No confirmed exploitation is on record for CVE-2026-5020. EPSS is 3.71%. Act only if a listed version of a3600r firmware is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Low2.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 3.71%
- Remediation
- Advisory link
- Affected products
- cpe totolink/a3600r firmware
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe totolink/a3600r firmware4.1.2cu.5182_b20201102
How to fix CVE-2026-5020
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-5020. EPSS is 3.71%. Act only if a listed version of a3600r firmware is installed.
Which versions are affected?
Compare what you have installed with totolink/a3600r firmware 4.1.2cu.5182_b20201102. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-74: Injection; CWE-77: Command Injection. EPSS 3.71%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 29, 2026 · NIST NVD
Detected
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.
Jun 17, 2026 · NIST NVD
Updated
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.
Sources
- CVE.orgVulnerability recordCVE-2026-5020
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-5020
30-day exploitation probability 3.7%
first.org - NIST NVDVulnerability recordCVE-2026-5020
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.