CVE-2024-34195: TOTOLINK AC1200 Wireless Router A3002R Firmware V1.1.1-B20200824 is vulnerable to Buffer Overflow

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2024-34195 is a critical-severity flaw (CVSS 9.8) affecting a3002r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TOTOLINK AC1200 Wireless Router A3002R Firmware V1.1.1-B20200824 is vulnerable to Buffer Overflow. In the boa server program's CGI handling function formWlEncrypt, there is a lack of length restriction on the wlan_ssid field. This oversight leads to potential buffer overflow under specific circumstances. For instance, by invoking the formWlanRedirect function with specific parameters to alter wlan_idx's value and subsequently invoking the formWlE

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-787, CWE-121
Published	2024-08-28
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

2024-08-28 20:15 UTCPublished CVE record published
2026-06-17 07:33 UTCUpdated Record last modified

totolink a3002r firmware MITIGATE

Affected: 1.1.1-b20200824

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1-b20200824

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-2024-34195?

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

Is CVE-2024-34195 being exploited?

CVE-2024-34195 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-2024-34195 affect?

CVE-2024-34195 affects a3002r firmware. Severity is critical (CVSS 9.8). TOTOLINK AC1200 Wireless Router A3002R Firmware V1.1.1-B20200824 is vulnerable to Buffer Overflow. In the boa server program's CGI handling function formWlEncrypt, there is a lack of length restriction on the wlan_ssid field. This oversight

How urgent is CVE-2024-34195?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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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