How severe is CVE-2010-4777?

CVE-2010-4777 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2010-4777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4777?

CVE-2010-4777 primarily affects Perl. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4777?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-4777 published?

CVE-2010-4777 was published on 2014-02-10 and last updated on 2026-06-16.

CVE-2010-4777

CVE-2010-4777 is a medium-severity vulnerability in Perl with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Perl
Published: 2014-02-10
Last modified: 2026-06-16

Description

The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0, 5.14.0, and other versions, when running with debugging enabled, allows context-dependent attackers to cause a denial of service (assertion failure and application exit) via crafted input that is not properly handled when using certain regular expressions, as demonstrated by causing SpamAssassin and OCSInventory to crash.

Frequently asked questions

What is CVE-2010-4777?: The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0, 5.14.0, and other versions, when running with debugging enabled, allows context-dependent attackers to cause a denial of service (assertion failure and application exit) via crafted input that is not properly handled when using certain regular expressions, as demonstrated by causing SpamAssassin and OCSInventory to crash.
How severe is CVE-2010-4777?: CVE-2010-4777 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2010-4777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4777?: CVE-2010-4777 primarily affects Perl. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4777?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-4777 published?: CVE-2010-4777 was published on 2014-02-10 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:perl:perl:5.10:*:*:*:*:*:*:*
cpe:2.3:a:perl:perl:5.12.0:*:*:*:*:*:*:*
cpe:2.3:a:perl:perl:5.14.0:*:*:*:*:*:*:*

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