CVE-2005-0255

NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 4%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
—
EG Score
0.0(none)
EPSS
90.0%
KEV
Not listed

Published

May 2, 2005

Last Modified

June 16, 2026

References (26)

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntumozilla-firefox-locale-pl () @ warty2026-05-31ubuntu
redhatthunderbird-0:1.0.2-1.4.12005-03-23redhat
redhatfirefox-0:1.0.1-1.4.32005-03-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-13 22:24 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-11 08:22 UTCEPSS rescore
  4. 2026-07-08 15:09 UTCEPSS rescore
  5. 2026-07-06 02:19 UTCEPSS rescore
  6. 2026-07-06 02:19 UTCEPSS rescore
  7. 2026-07-02 14:00 UTCEPSS rescore
  8. 2026-07-01 15:01 UTCEPSS rescore
  9. 2026-06-29 14:02 UTCEPSS rescore
  10. 2026-06-29 14:02 UTCEPSS rescore
  11. 2026-06-28 04:52 UTCEPSS rescore
  12. 2026-06-27 03:04 UTCEPSS rescore
  13. 2026-06-25 13:46 UTCEPSS rescore
  14. 2026-06-24 14:01 UTCEPSS rescore
  15. 2026-06-23 21:29 UTCEPSS rescore
  16. 2026-06-22 14:22 UTCEPSS rescore
  17. 2026-06-22 14:22 UTCEPSS rescore
  18. 2026-06-21 01:56 UTCEPSS rescore
  19. 2026-06-18 17:49 UTCEPSS rescore
  20. 2026-06-18 17:49 UTCEPSS rescore
  21. 2026-06-17 17:49 UTCEPSS rescore
  22. 2026-06-17 17:49 UTCEPSS rescore
  23. 2026-06-16 17:49 UTCEPSS rescore
  24. 2026-06-16 17:49 UTCEPSS rescore
  25. 2026-06-15 17:44 UTCEPSS rescore
Show 41 more
  1. 2026-06-13 22:56 UTCEPSS rescore
  2. 2026-06-12 23:08 UTCEPSS rescore
  3. 2026-06-11 13:55 UTCEPSS rescore
  4. 2026-06-10 22:14 UTCEPSS rescore
  5. 2026-06-10 13:17 UTCEPSS rescore
  6. 2026-06-08 14:13 UTCEPSS rescore
  7. 2026-06-07 15:21 UTCEPSS rescore
  8. 2026-06-06 13:44 UTCEPSS rescore
  9. 2026-06-06 13:44 UTCEPSS rescore
  10. 2026-06-05 22:43 UTCEPSS rescore
  11. 2026-06-05 22:43 UTCEPSS rescore
  12. 2026-06-05 06:07 UTCEPSS rescore
  13. 2026-06-05 06:07 UTCEPSS rescore
  14. 2026-06-04 13:09 UTCEPSS rescore
  15. 2026-06-04 13:09 UTCEPSS rescore
  16. 2026-06-02 20:10 UTCEPSS rescore
  17. 2026-06-02 20:10 UTCEPSS rescore
  18. 2026-06-01 13:49 UTCEPSS rescore
  19. 2026-06-01 13:49 UTCEPSS rescore
  20. 2026-05-31 22:28 UTCEPSS rescore
  21. 2026-05-31 13:38 UTCEG score recompute
  22. 2026-05-31 13:38 UTCVendor advisory
  23. 2026-05-31 13:38 UTCGHSA enrichment
  24. 2026-05-31 00:13 UTCEPSS rescore
  25. 2026-05-31 00:13 UTCEPSS rescore
  26. 2026-05-29 13:40 UTCEPSS rescore
  27. 2026-05-29 13:40 UTCEPSS rescore
  28. 2026-05-28 13:42 UTCEPSS rescore
  29. 2026-05-28 13:42 UTCEPSS rescore
  30. 2026-05-28 13:42 UTCEPSS rescore
  31. 2026-05-27 13:37 UTCEPSS rescore
  32. 2026-05-26 13:41 UTCEPSS rescore
  33. 2026-05-26 13:41 UTCEPSS rescore
  34. 2026-05-24 16:42 UTCEPSS rescore
  35. 2026-05-22 21:15 UTCEPSS rescore
  36. 2026-05-21 22:38 UTCEPSS rescore
  37. 2026-05-20 22:36 UTCEPSS rescore
  38. 2026-05-20 22:36 UTCEPSS rescore
  39. 2026-05-20 11:20 UTCEPSS rescore
  40. 2026-05-20 11:20 UTCEPSS rescore
  41. 2026-05-18 21:29 UTCEPSS rescore

Frequently asked(4)

What is CVE-2005-0255?
CVE-2005-0255 is a none vulnerability published on May 2, 2005. 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…
When was CVE-2005-0255 disclosed?
CVE-2005-0255 was first published in the National Vulnerability Database on May 2, 2005, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2005-0255 actively exploited?
CVE-2005-0255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2005-0255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2005-0255, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2005-0255

Explore →

Is Your Infrastructure Affected by CVE-2005-0255?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs