How severe is CVE-2007-0493?

CVE-2007-0493 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-0493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-0493?

CVE-2007-0493 primarily affects Isc Bind. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-0493?

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-2007-0493 published?

CVE-2007-0493 was published on 2007-01-25 and last updated on 2026-06-16.

CVE-2007-0493

CVE-2007-0493 is a high-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Isc Bind
Published: 2007-01-25
Last modified: 2026-06-16

Description

Use-after-free vulnerability in ISC BIND 9.3.0 up to 9.3.3, 9.4.0a1 up to 9.4.0a6, 9.4.0b1 up to 9.4.0b4, 9.4.0rc1, and 9.5.0a1 (Bind Forum only) allows remote attackers to cause a denial of service (named daemon crash) via unspecified vectors that cause named to "dereference a freed fetch context."

Frequently asked questions

What is CVE-2007-0493?: Use-after-free vulnerability in ISC BIND 9.3.0 up to 9.3.3, 9.4.0a1 up to 9.4.0a6, 9.4.0b1 up to 9.4.0b4, 9.4.0rc1, and 9.5.0a1 (Bind Forum only) allows remote attackers to cause a denial of service (named daemon crash) via unspecified vectors that cause named to "dereference a freed fetch context."
How severe is CVE-2007-0493?: CVE-2007-0493 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-0493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-0493?: CVE-2007-0493 primarily affects Isc Bind. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-0493?: 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-2007-0493 published?: CVE-2007-0493 was published on 2007-01-25 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:isc:bind:9.3.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.3.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.3.2:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.5.0:*:*:*:*:*:*:*

More vulnerabilities in Isc Bind

CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
CVE-2001-0011 — Critical (CVSS 10.0): Buffer overflow in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
CVE-2001-0013 — Critical (CVSS 10.0): Format string vulnerability in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
CVE-2001-0010 — Critical (CVSS 10.0): Buffer overflow in transaction signature (TSIG) handling code in BIND 8 allows remote attackers to gain root privileges.
CVE-2000-1029 — Critical (CVSS 10.0): Buffer overflow in host command allows a remote attacker to execute arbitrary commands via a long response to an AXFR…
CVE-1999-0837 — Critical (CVSS 10.0): Denial of service in BIND by improperly closing TCP sessions via so_linger.

All CVEs affecting Isc Bind →