CVE-2025-55613: Tenda O3V2 1.0.0.12(3880) is vulnerable to Buffer Overflow in the fromSafeSetMacFilter function via the mac pa

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CRITICAL 9.8REMOTEMITIGATE

CVE-2025-55613 is a critical-severity flaw (CVSS 9.8) affecting o3 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tenda O3V2 1.0.0.12(3880) is vulnerable to Buffer Overflow in the fromSafeSetMacFilter function via the mac parameter.

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	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-120
Published	2025-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tenda

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

Am I affected?

Timeline

2025-08-22 18:15 UTCPublished CVE record published
2026-06-17 09:41 UTCUpdated Record last modified

tenda o3 firmware MITIGATE

Affected: 1.0.0.12\(3880\)

Fixed in: no fixed release known

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-2025-55613?

o3 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-55613 being exploited?

CVE-2025-55613 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-2025-55613 affect?

CVE-2025-55613 affects o3 firmware. Severity is critical (CVSS 9.8). Tenda O3V2 1.0.0.12(3880) is vulnerable to Buffer Overflow in the fromSafeSetMacFilter function via the mac parameter.

How urgent is CVE-2025-55613?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-7423 HIGH 8.8 MITIGATE A vulnerability classified as critical was found in Tenda O3V2 1.0.0.12(3880)
CVE-2025-7422 HIGH 8.8 MITIGATE A vulnerability classified as critical has been found in Tenda O3V2 1.0.0.12(3880)
CVE-2025-7421 HIGH 8.8 MITIGATE A vulnerability was found in Tenda O3V2 1.0.0.12(3880)
CVE-2025-7420 HIGH 8.8 MITIGATE A vulnerability was found in Tenda O3V2 1.0.0.12(3880)
CVE-2025-7419 HIGH 8.8 MITIGATE A vulnerability was found in Tenda O3V2 1.0.0.12(3880)

References

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