How severe is CVE-2009-4293?

CVE-2009-4293 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2009-4293 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4293?

CVE-2009-4293 primarily affects Iij Seil/x1 Firmware. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4293?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-4293 published?

CVE-2009-4293 was published on 2009-12-10 and last updated on 2026-06-16.

CVE-2009-4293

CVE-2009-4293 is a high-severity vulnerability in Iij Seil/x1 Firmware with a CVSS 2.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Iij Seil/x1 Firmware
Published: 2009-12-10
Last modified: 2026-06-16

Description

Internet Initiative Japan SEIL/X1, SEIL/X2, and SEIL/B1 firmware 2.30 through 2.51, when NAT is enabled, allows remote attackers to cause a denial of service (system restart) via crafted GRE packets.

Frequently asked questions

What is CVE-2009-4293?: Internet Initiative Japan SEIL/X1, SEIL/X2, and SEIL/B1 firmware 2.30 through 2.51, when NAT is enabled, allows remote attackers to cause a denial of service (system restart) via crafted GRE packets.
How severe is CVE-2009-4293?: CVE-2009-4293 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2009-4293 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4293?: CVE-2009-4293 primarily affects Iij Seil/x1 Firmware. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-4293 published?: CVE-2009-4293 was published on 2009-12-10 and last updated on 2026-06-16.

References

Affected products (21)

cpe:2.3:a:iij:seil\/x1_firmware:2.30:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.40:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.41:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.42:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.50:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.51:*:*:*:*:*:*:*
cpe:2.3:h:iij:seil\/x1:*:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.30:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.40:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.41:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.42:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.50:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.51:*:*:*:*:*:*:*
cpe:2.3:h:iij:seil\/b1:*:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.30:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.40:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.41:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.42:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.50:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x2_firmware:2.51:*:*:*:*:*:*:*
cpe:2.3:h:iij:seil\/x2:*:*:*:*:*:*:*:*

More vulnerabilities in Iij Seil/x1 Firmware

CVE-2009-4292 — Critical (CVSS 9.3): Buffer overflow in the URL filtering function in Internet Initiative Japan SEIL/X1, SEIL/X2, and SEIL/B1 firmware 2.40…
CVE-2011-0454 — High (CVSS 8.3): Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware 1.00 through 1.61, SEIL/B1 with…
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CVE-2010-2363 — Medium (CVSS 5.8): The IPv6 Unicast Reverse Path Forwarding (RPF) implementation on the SEIL/X1, SEIL/X2, and SEIL/B1 routers with…

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