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CVE-2009-3962: The management interface on the 2wire Gateway 1700HG, 1701HG, 1800HW, 2071, 2700HG, and 2701HG-T with software

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HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2009-3962 is a high-severity flaw (CVSS 7.8) affecting 1700hg, 1701hg, 1800hw. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The management interface on the 2wire Gateway 1700HG, 1701HG, 1800HW, 2071, 2700HG, and 2701HG-T with software before 5.29.52 allows remote attackers to cause a denial of service (reboot) via a %0d%0a sequence in the page parameter to the xslt program on TCP port 50001, a related issue to CVE-2006-4523.

Why this priority

  • High severity
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
EPSS exploit chance3.0% (top 13%)
CISA exploited listNo
WeaknessCWE-20
Published2009-11-17
Last modified2026-06-16
Publisher (CNA): MITRE · Vendor: 2wire

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

Am I affected?

Timeline

2wire 1700hg UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.
2wire 1701hg UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.
2wire 1800hw UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.
2wire 2071 UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.
2wire 2700hg UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.
2wire 2701hg-t UPGRADE
Affected: all versions · <= 5.29.51
Fixed in: newer than 5.29.51
Safe to downgrade to: no unaffected older release
Firmware
Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

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-2009-3962?

1700hg: upgrade to newer than 5.29.51; 1701hg: upgrade to newer than 5.29.51; 1800hw: upgrade to newer than 5.29.51. Exact commands for each OS are on this page.

Is CVE-2009-3962 being exploited?

CVE-2009-3962 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-2009-3962 affect?

CVE-2009-3962 affects 1700hg, 1701hg, 1800hw. Severity is high (CVSS 7.8). The management interface on the 2wire Gateway 1700HG, 1701HG, 1800HW, 2071, 2700HG, and 2701HG-T with software before 5.29.52 allows remote attackers to cause a denial of service (reboot) via a %0d%0a sequence in the page parameter to the x

How urgent is CVE-2009-3962?

Priority 54/100. High severity; Public exploit reference

References

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