CVE-2016-2099

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 7%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Use-after-free vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 3.1.3 and earlier allows context-dependent attackers to have unspecified impact via an invalid character in an XML document.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation7% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
93.3%
KEV
Not listed

Published

May 13, 2016

Last Modified

May 6, 2026

Advisory Details (5)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

Xerces-C++: Multiple vulnerabilities (GLSA 201612-46) — Gentoo security

https://security.gentoo.org/glsa/201612-46
generic

[XERCESC-2066] Exception handling mistake in DTDScanner - ASF Jira

https://issues.apache.org/jira/browse/XERCESC-2066
generic
http://www.securityfocus.com/bid/90502
generic

oss-security - CVE-2016-2099: use-after-free in Xerces 3.1.3

http://www.openwall.com/lists/oss-security/2016/05/09/7
generic

[SECURITY] [DSA 3579-1] xerces-c security update

http://www.debian.org/security/2016/dsa-3579

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibxerces-c-doc (3.1.3+debian-1ubuntu0.1~esm1) @ xenial2026-05-20ubuntu

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

(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 12× in last 7d / 41× 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.

Showing the most recent 100 of 119 total refreshes for this CVE.

  1. 2026-07-23 14:14 UTCEPSS rescore
  2. 2026-07-23 01:22 UTCEG score recompute
  3. 2026-07-22 22:01 UTCEG score recompute
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-21 15:21 UTCEPSS rescore
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  24. 2026-07-09 19:05 UTCEPSS rescore
  25. 2026-07-08 15:10 UTCEPSS rescore
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  1. 2026-07-08 05:57 UTCOSV refresh
  2. 2026-07-07 13:42 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-06 16:24 UTCEPSS rescore
  5. 2026-07-06 02:20 UTCEPSS rescore
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  7. 2026-07-05 02:27 UTCEPSS rescore
  8. 2026-07-04 06:28 UTCEPSS rescore
  9. 2026-07-01 15:02 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-28 14:04 UTCEPSS rescore
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  20. 2026-06-21 14:54 UTCEPSS rescore
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  22. 2026-06-21 01:57 UTCEPSS rescore
  23. 2026-06-21 01:57 UTCEPSS rescore
  24. 2026-06-19 19:23 UTCEPSS rescore
  25. 2026-06-19 19:23 UTCEPSS rescore
  26. 2026-06-19 17:55 UTCOSV refresh
  27. 2026-06-18 17:50 UTCEPSS rescore
  28. 2026-06-17 17:50 UTCEPSS rescore
  29. 2026-06-17 17:50 UTCEPSS rescore
  30. 2026-06-16 17:50 UTCEPSS rescore
  31. 2026-06-16 17:50 UTCEPSS rescore
  32. 2026-06-15 17:45 UTCEPSS rescore
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  36. 2026-06-12 23:09 UTCEPSS rescore
  37. 2026-06-12 23:09 UTCEPSS rescore
  38. 2026-06-11 13:57 UTCEPSS rescore
  39. 2026-06-10 22:15 UTCEPSS rescore
  40. 2026-06-10 13:18 UTCEPSS rescore
  41. 2026-06-08 14:14 UTCEPSS rescore
  42. 2026-06-07 15:22 UTCEPSS rescore
  43. 2026-06-07 15:22 UTCEPSS rescore
  44. 2026-06-06 13:45 UTCEPSS rescore
  45. 2026-06-05 22:44 UTCEPSS rescore
  46. 2026-06-05 06:08 UTCEPSS rescore
  47. 2026-06-05 06:08 UTCEPSS rescore
  48. 2026-06-04 13:10 UTCEPSS rescore
  49. 2026-06-04 13:10 UTCEPSS rescore
  50. 2026-06-02 20:10 UTCEPSS rescore
  51. 2026-06-01 13:49 UTCEPSS rescore
  52. 2026-06-01 13:49 UTCEPSS rescore
  53. 2026-05-31 22:28 UTCEPSS rescore
  54. 2026-05-31 22:28 UTCEPSS rescore
  55. 2026-05-31 00:14 UTCEPSS rescore
  56. 2026-05-30 23:23 UTCOSV refresh
  57. 2026-05-29 13:41 UTCEPSS rescore
  58. 2026-05-28 13:42 UTCEPSS rescore
  59. 2026-05-28 13:42 UTCEPSS rescore
  60. 2026-05-27 13:38 UTCEPSS rescore
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  62. 2026-05-26 13:42 UTCEPSS rescore
  63. 2026-05-26 07:16 UTCEPSS rescore
  64. 2026-05-24 16:43 UTCEPSS rescore
  65. 2026-05-22 21:15 UTCEPSS rescore
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  67. 2026-05-21 22:40 UTCEPSS rescore
  68. 2026-05-20 22:37 UTCEPSS rescore
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  73. 2026-05-20 11:21 UTCEPSS rescore
  74. 2026-05-20 09:19 UTCVendor advisory
  75. 2026-05-20 09:19 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2016-2099?
CVE-2016-2099 is a critical vulnerability published on May 13, 2016. Use-after-free vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 3.1.3 and earlier allows context-dependent attackers to have unspecified impact via an invalid character in an XML document.
When was CVE-2016-2099 disclosed?
CVE-2016-2099 was first published in the National Vulnerability Database on May 13, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-2099 actively exploited?
CVE-2016-2099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-2099?
CVE-2016-2099 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-2099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-2099, 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.

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