CVE-2012-2632: SEIL routers with firmware SEIL/x86 1.00 through 2.35, SEIL/X1 2.30 through 3.75, SEIL/X2 2.30 through 3.75, a

Routine

LOW 2.6MITIGATEMITIGATEMITIGATE

CVE-2012-2632 is a low-severity flaw (CVSS 2.6) affecting b1, x1, x2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SEIL routers with firmware SEIL/x86 1.00 through 2.35, SEIL/X1 2.30 through 3.75, SEIL/X2 2.30 through 3.75, and SEIL/B1 2.30 through 3.75, when the http-proxy and application-gateway features are enabled, do not properly handle the CONNECT command, which allows remote attackers to bypass intended URL restrictions via a TCP session.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Published	2012-06-15
Last modified	2026-06-16

Publisher (CNA): JPCERT/CC · Vendor: seil

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-06-15 19:55 UTCPublished CVE record published
2026-06-16 23:41 UTCUpdated Record last modified

seil b1 MITIGATE

Affected: 2.30 · 2.40 · 2.41 · 2.42 · 2.50 · 2.51 · 2.52 · 2.60

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.30

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

seil x1 MITIGATE

Affected: 2.30 · 2.40 · 2.41 · 2.42 · 2.50 · 2.51 · 2.52 · 2.60

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.30

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

seil x2 MITIGATE

Affected: 2.30 · 2.40 · 2.41 · 2.42 · 2.50 · 2.51 · 2.52 · 2.60

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.30

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

seil b1 firmware MITIGATE

Affected: 2.30 · 2.40 · 2.41 · 2.42 · 2.50 · 2.51 · 2.52 · 2.60

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.30

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.

seil x86 firmware MITIGATE

Affected: 1.00 · 1.61

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.00

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-2012-2632?

b1: mitigate or apply the listed mitigation; x1: mitigate or apply the listed mitigation; x2: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-2632 being exploited?

CVE-2012-2632 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-2012-2632 affect?

CVE-2012-2632 affects b1, x1, x2. Severity is low (CVSS 2.6). SEIL routers with firmware SEIL/x86 1.00 through 2.35, SEIL/X1 2.30 through 3.75, SEIL/X2 2.30 through 3.75, and SEIL/B1 2.30 through 3.75, when the http-proxy and application-gateway features are enabled, do not properly handle the CONNECT

How urgent is CVE-2012-2632?

Priority 26/100. No elevated risk signals yet.

References

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