CVE-2024-7157: A vulnerability was found in TOTOLINK A3100R 4.1.2cu.5050_B20200504

This month

HIGH 8.8MITIGATE

CVE-2024-7157 is a high-severity flaw (CVSS 8.8) affecting a3100r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in TOTOLINK A3100R 4.1.2cu.5050_B20200504. It has been classified as critical. This affects the function getSaveConfig of the file /cgi-bin/cstecgi.cgi?action=save&setting. The manipulation of the argument http_host leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-272571. NOTE: The

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	7.4% (top 6%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-07-28
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: totolink

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

Am I affected?

Timeline

2024-07-28 11:15 UTCPublished CVE record published
2026-06-17 08:19 UTCUpdated Record last modified

totolink a3100r firmware MITIGATE

Affected: 4.1.2cu.5050_b20200504

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.2cu.5050_b20200504

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-2024-7157?

a3100r firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-7157 being exploited?

CVE-2024-7157 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-2024-7157 affect?

CVE-2024-7157 affects a3100r firmware. Severity is high (CVSS 8.8). A vulnerability was found in TOTOLINK A3100R 4.1.2cu.5050_B20200504. It has been classified as critical. This affects the function getSaveConfig of the file /cgi-bin/cstecgi.cgi?action=save&setting. The manipulation of the argument http_hos

How urgent is CVE-2024-7157?

Priority 59/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2025-4496 HIGH 8.8 MITIGATE MITIGATE A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210
CVE-2025-45790 CRITICAL 9.8 MITIGATE TOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the priority parameter in the setMacQos interf
CVE-2025-45789 CRITICAL 9.8 MITIGATE TOTOLINK A3100R V5.9c.1527 is vulnerable to buffer overflow via the urlKeyword parameter in setParentalRules.
CVE-2025-45788 CRITICAL 9.8 MITIGATE TOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the comment parameter in setMacFilterRules.
CVE-2025-45787 CRITICAL 9.8 MITIGATE TOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow viathe comment parameter in setIpPortFilterRules.

References

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