CVE-2025-25527: Buffer overflow vulnerability in Ruijie RG-NBR2600S Gateway 10.3(4b12) due to the lack of length verification,

Routine

MEDIUM 5.1MITIGATE

CVE-2025-25527 is a medium-severity flaw (CVSS 5.1) affecting rg-nbr2600s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow vulnerability in Ruijie RG-NBR2600S Gateway 10.3(4b12) due to the lack of length verification, which is related to the configuration of source address NAT rules. Attackers who successfully exploit this vulnerability can cause the remote target device to crash or execute arbitrary commands.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.1 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-120
Published	2025-02-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ruijie

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

Am I affected?

Timeline

2025-02-11 20:15 UTCPublished CVE record published
2026-06-17 09:00 UTCUpdated Record last modified

ruijie rg-nbr2600s firmware MITIGATE

Affected: 10.3\(4b12\)

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-2025-25527?

rg-nbr2600s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-25527 being exploited?

CVE-2025-25527 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-2025-25527 affect?

CVE-2025-25527 affects rg-nbr2600s firmware. Severity is medium (CVSS 5.1). Buffer overflow vulnerability in Ruijie RG-NBR2600S Gateway 10.3(4b12) due to the lack of length verification, which is related to the configuration of source address NAT rules. Attackers who successfully exploit this vulnerability can caus

How urgent is CVE-2025-25527?

Priority 22/100. No elevated risk signals yet.

References

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