CVE-2007-0435: T-Com Speedport 500V routers with firmware 1.31 allow remote attackers to bypass authentication and reconfigur

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HIGH 7.5MITIGATEMITIGATE

CVE-2007-0435 is a high-severity flaw (CVSS 7.5) affecting speedport 500v, speedport 500v firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

T-Com Speedport 500V routers with firmware 1.31 allow remote attackers to bypass authentication and reconfigure the device via a LOGINKEY=TECOM cookie value.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-287
Published	2007-01-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: t-com

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

Am I affected?

Timeline

2007-01-23 02:28 UTCPublished CVE record published
2026-06-16 22:35 UTCUpdated Record last modified

t-com speedport 500v MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

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

t-com speedport 500v firmware MITIGATE

Affected: 1.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.31

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-2007-0435?

speedport 500v: mitigate or apply the listed mitigation; speedport 500v firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-0435 being exploited?

CVE-2007-0435 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-2007-0435 affect?

CVE-2007-0435 affects speedport 500v, speedport 500v firmware. Severity is high (CVSS 7.5). T-Com Speedport 500V routers with firmware 1.31 allow remote attackers to bypass authentication and reconfigure the device via a LOGINKEY=TECOM cookie value.

How urgent is CVE-2007-0435?

Priority 46/100. High severity

References

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