CVE-2026-63273

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.4 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from the CNA's CVSS
Sources: the CNA's CVSS, EPSS

Also known asEUVD-2026-84353 (ENISA EUVD) · GHSA-254q-47m3-r67w (GitHub Security Advisories)Source: ENISA EUVD

5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.the CNA's CVSS · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 22, 2026

Last Modified

September 28, 2026

Advisory Details (1)

Auto-updated Sep 22, 2026
Patch available.
Web page

Security advisories — LibreOffice

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63273

Vendor Advisories for CVE-2026-63273(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuure-java (4:26.2.6.3-0ubuntu0.26.04.2) @ resolute2026-10-22ubuntu

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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:24.2.0-1 ... 4:7.6.4~rc1-1~bpo12+1 (248 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:25.2.3-2 ... 4:25.2.3-2+deb13u6 (10 versions)
  • every version up to 4:25.2.3-2+deb13u7: fixed in 4:25.2.3-2+deb13u7
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:25.2.3-2 ... 4:26.2.4.2-2 (56 versions)
  • every version up to 4:26.2.5.2-1: fixed in 4:26.2.5.2-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

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 6× in last 7d / 56× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-25 14:13 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-22 19:50 UTCEG score recompute
  12. 2026-10-22 19:50 UTCVendor advisory
  13. 2026-10-22 19:50 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-18 03:23 UTCEG score recompute
  18. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-12 15:49 UTCEG score recompute
  25. 2026-10-11 23:12 UTCVendor advisory
Show 59 more
  1. 2026-10-11 23:12 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  2. 2026-10-11 19:33 UTCEG score recompute
  3. 2026-10-11 16:48 UTCEG score recompute
  4. 2026-10-11 14:10 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-10 22:43 UTCEG score recompute
  7. 2026-10-10 22:43 UTCVendor advisory
  8. 2026-10-10 22:43 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-09 22:14 UTCEG score recompute
  11. 2026-10-09 22:14 UTCVendor advisory
  12. 2026-10-09 22:14 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-08 21:45 UTCEG score recompute
  15. 2026-10-08 21:45 UTCVendor advisory
  16. 2026-10-08 21:44 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-07 20:53 UTCVendor advisory
  20. 2026-10-07 20:53 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  21. 2026-10-06 20:19 UTCEG score recompute
  22. 2026-10-06 20:19 UTCVendor advisory
  23. 2026-10-06 20:18 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-05 19:47 UTCEG score recompute
  26. 2026-10-05 19:47 UTCVendor advisory
  27. 2026-10-05 19:46 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  28. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  29. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  30. 2026-10-04 19:17 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  31. 2026-10-03 18:48 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  32. 2026-10-02 17:48 UTCEG score recompute
  33. 2026-10-02 17:48 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  34. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-10-01 17:19 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  36. 2026-09-30 16:47 UTCEG score recompute
  37. 2026-09-30 16:47 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  38. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  39. 2026-09-29 15:12 UTCEG score recompute
  40. 2026-09-29 15:12 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  41. 2026-09-28 14:42 UTCEG score recompute
  42. 2026-09-28 14:42 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  43. 2026-09-27 21:39 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  44. 2026-09-26 21:09 UTCEG score recompute
  45. 2026-09-26 21:09 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  47. 2026-09-25 20:41 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  48. 2026-09-24 20:11 UTCEG score recompute
  49. 2026-09-24 20:11 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  50. 2026-09-23 19:42 UTCEG score recompute
  51. 2026-09-23 19:42 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  52. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-09-22 19:12 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  54. 2026-09-22 13:18 UTCEG score recompute
  55. 2026-09-22 13:18 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  56. 2026-09-22 12:35 UTCEG score recompute
  57. 2026-09-22 12:35 UTCGHSA enrichmentGHSA-254q-47m3-r67w
  58. 2026-09-22 11:21 UTCEG score recomputeFirst assessed: 5.4 MEDIUM
  59. 2026-09-22 11:20 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-63273?
CVE-2026-63273 is a medium-severity vulnerability; its CVE record was published on September 22, 2026. LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger…
When was CVE-2026-63273 made public?
CVE-2026-63273 was made public on September 21, 2026: that is the date its CVE record's CNA, Document Fdn., gives for when the vulnerability was made public. The CVE record itself was published on September 22, 2026. EchelonGraph's copy of the record carries a last-modified date of September 28, 2026; the record at its source may have been updated since.
Is CVE-2026-63273 actively exploited?
CVE-2026-63273 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63273?
CVE-2026-63273 has a CVSS base score of 5.4 (the CNA's own assessment, by document fdn.; NVD's own analysis pending).
How do I remediate CVE-2026-63273?
A fix for CVE-2026-63273 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63273 are linked in the Vendor Advisories panel on this page.

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