How severe is CVE-2007-0251?

CVE-2007-0251 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-0251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-0251?

CVE-2007-0251 affects Snort. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-0251?

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-2007-0251 published?

CVE-2007-0251 was published on 2007-01-16 and last updated on 2026-06-16.

CVE-2007-0251

CVE-2007-0251 is a high-severity vulnerability in Snort with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Snort
Published: 2007-01-16
Last modified: 2026-06-16

Description

Integer underflow in the DecodeGRE function in src/decode.c in Snort 2.6.1.2 allows remote attackers to trigger dereferencing of certain memory locations via crafted GRE packets, which may cause corruption of log files or writing of sensitive information into log files.

Frequently asked questions

What is CVE-2007-0251?: Integer underflow in the DecodeGRE function in src/decode.c in Snort 2.6.1.2 allows remote attackers to trigger dereferencing of certain memory locations via crafted GRE packets, which may cause corruption of log files or writing of sensitive information into log files.
How severe is CVE-2007-0251?: CVE-2007-0251 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-0251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-0251?: CVE-2007-0251 affects Snort. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-0251?: 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-2007-0251 published?: CVE-2007-0251 was published on 2007-01-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:snort:snort:2.6.1.2:*:*:*:*:*:*:*

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