CVE-2005-0255

Status: ModifiedMedium (5)—

String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as the nsTSubstring_CharT::Replace function, do not properly check the return values of other functions that resize the string, which allows remote attackers to cause a denial of service and possibly execute arbitrary code by forcing an out-of-memory state that causes a reallocation to fail and return a pointer to a fixed address, which leads to heap corruption.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Base score: 5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 4.29%
Percentile among all scored CVEs: 91
Score date: 10/11/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Mozilla — Firefox Mozilla — Mozilla Mozilla — Thunderbird

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

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          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
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  "lastModified": "2026-06-16T22:10:47.353",
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