How severe is CVE-2011-0454?

CVE-2011-0454 has a CVSS 2.0 base score of 8.3, rated high severity.

Is CVE-2011-0454 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0454?

CVE-2011-0454 primarily affects Iij Seil/b1 Firmware. In total, 154 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0454?

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-2011-0454 published?

CVE-2011-0454 was published on 2011-03-01 and last updated on 2026-06-16.

CVE-2011-0454

CVE-2011-0454 is a high-severity vulnerability in Iij Seil/b1 Firmware with a CVSS 2.0 base score of 8.3. 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-119.

Key facts

Severity: High (CVSS 2.0 base score 8.3)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Iij Seil/b1 Firmware
Published: 2011-03-01
Last modified: 2026-06-16

Description

Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware 1.00 through 1.61, SEIL/B1 with firmware 1.00 through 3.11, SEIL/X1 with firmware 1.00 through 3.11, SEIL/X2 with firmware 1.00 through 3.11, SEIL/Turbo with firmware 1.80 through 2.10, and SEIL/neu 2FE Plus with firmware 1.80 through 2.10 might allow remote attackers to execute arbitrary code via a PPPoE packet.

Frequently asked questions

What is CVE-2011-0454?: Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware 1.00 through 1.61, SEIL/B1 with firmware 1.00 through 3.11, SEIL/X1 with firmware 1.00 through 3.11, SEIL/X2 with firmware 1.00 through 3.11, SEIL/Turbo with firmware 1.80 through 2.10, and SEIL/neu 2FE Plus with firmware 1.80 through 2.10 might allow remote attackers to execute arbitrary code via a PPPoE packet.
How severe is CVE-2011-0454?: CVE-2011-0454 has a CVSS 2.0 base score of 8.3, rated high severity.
Is CVE-2011-0454 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0454?: CVE-2011-0454 primarily affects Iij Seil/b1 Firmware. In total, 154 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0454?: 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-2011-0454 published?: CVE-2011-0454 was published on 2011-03-01 and last updated on 2026-06-16.

References

Affected products (154)

cpe:2.3:a:iij:seil\/b1_firmware:1.00:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.01:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.10:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.20:*:*:*:*:*:*:*
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:a:iij:seil\/b1_firmware:2.52:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.60:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.61:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.62:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.63:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.70:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.72:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.73:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.74:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:2.75:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:3.01:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:3.02:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:3.10:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/b1_firmware:3.11:*:*:*:*:*:*:*
cpe:2.3:h:iij:seil\/b1:*:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.00:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.10:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.11:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.20:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.21:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.22:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.30:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.31:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.32:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.40:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:1.44:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.10:*:*:*:*:*:*:*
cpe:2.3:a:iij:seil\/x1_firmware:2.20:*:*:*:*:*:*:*

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