CVE-2024-33820: Totolink AC1200 Wireless Dual Band Gigabit Router A3002R_V4 Firmware V4.0.0-B20230531.1404 is vulnerable to Bu

This month

HIGH 7.5MITIGATE

CVE-2024-33820 is a high-severity flaw (CVSS 7.5) affecting a3002r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Totolink AC1200 Wireless Dual Band Gigabit Router A3002R_V4 Firmware V4.0.0-B20230531.1404 is vulnerable to Buffer Overflow via the formWlEncrypt function of the boa server. Specifically, they exploit the length of the wlan_ssid field triggers the overflow.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-05-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: totolink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-05-01 16:15 UTCPublished CVE record published
2026-06-17 07:32 UTCUpdated Record last modified

totolink a3002r firmware MITIGATE

Affected: 4.0.0-b20230531.1404

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0-b20230531.1404

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-33820?

a3002r firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-33820 being exploited?

CVE-2024-33820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-33820 affect?

CVE-2024-33820 affects a3002r firmware. Severity is high (CVSS 7.5). Totolink AC1200 Wireless Dual Band Gigabit Router A3002R_V4 Firmware V4.0.0-B20230531.1404 is vulnerable to Buffer Overflow via the formWlEncrypt function of the boa server. Specifically, they exploit the length of the wlan_ssid field trigg

How urgent is CVE-2024-33820?

Priority 43/100. High severity; Public exploit reference

Related CVEs

CVE-2025-6487 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK A3002R 1.1.1-B20200824.0128
CVE-2025-6486 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK A3002R 1.1.1-B20200824.0128
CVE-2025-6485 MEDIUM 6.3 MITIGATE A vulnerability was found in TOTOLINK A3002R 1.1.1-B20200824.0128
CVE-2025-6393 HIGH 8.8 MITIGATE MITIGATE A vulnerability was found in TOTOLINK A702R, A3002R, A3002RU and EX1200T 3.0.0-B20230809.1615/4.0.0-B20230531.
CVE-2025-6337 HIGH 8.8 MITIGATE MITIGATE A vulnerability was found in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615/4.0.0-B20230531.1404

References

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