CVE-2026-26736: TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the stat

Q: How do I fix CVE-2026-26736?

a3002ru firmware: upgrade to newer than 3.0.0-b20220304.1804. Exact commands for each OS are on this page.

Q: Is CVE-2026-26736 being exploited?

CVE-2026-26736 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26736 affect?

CVE-2026-26736 affects a3002ru firmware. Severity is high (CVSS 8.8). TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

Q: How urgent is CVE-2026-26736?

Priority 47/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-26736 is a high-severity flaw (CVSS 8.8) affecting a3002ru firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-787, CWE-121
Published	2026-02-17
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

2026-02-17 19:21 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

totolink a3002ru firmware UPGRADE

Affected: <= 3.0.0-b20220304.1804

Fixed in: newer than 3.0.0-b20220304.1804

Safe to downgrade to: no unaffected older release

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-2026-26736?

a3002ru firmware: upgrade to newer than 3.0.0-b20220304.1804. Exact commands for each OS are on this page.

Is CVE-2026-26736 being exploited?

CVE-2026-26736 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-2026-26736 affect?

CVE-2026-26736 affects a3002ru firmware. Severity is high (CVSS 8.8). TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

How urgent is CVE-2026-26736?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2026-26731 HIGH 8.8 MITIGATE TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routern
CVE-2026-26732 HIGH 8.8 MITIGATE TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the vpnUser
CVE-2025-6953 HIGH 8.8 MITIGATE A vulnerability, which was classified as critical, was found in TOTOLINK A3002RU 3.0.0-B20230809.1615
CVE-2025-6939 HIGH 8.8 MITIGATE A vulnerability classified as critical has been found in TOTOLINK A3002RU 3.0.0-B20230809.1615
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.

References

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