CVE-2016-0721

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.3%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Session fixation vulnerability in pcsd in pcs before 0.9.157.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity81% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.3%
EPSS %ILE
82nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 21, 2017

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated Sep 12, 2026
Patch available. Sources: redhat, github_commit.
github_commit Patch Available

commit e9b28833d54a (ClusterLabs/pcs)

Patch available: ClusterLabs/pcs v0.12.0a1 (contains commit e9b28833d54a)

https://github.com/ClusterLabs/pcs/commit/e9b28833d54a47ec441f6dbad0db96e1fc662a5b
github_commit Patch Available

commit bc6ad9086857 (ClusterLabs/pcs)

Patch available: ClusterLabs/pcs v0.12.0a1 (contains commit bc6ad9086857)

https://github.com/ClusterLabs/pcs/commit/bc6ad9086857559db57f4e3e6de66762291c0774
github_commit Patch Available

commit acdbbe8307e6 (ClusterLabs/pcs)

Patch available: ClusterLabs/pcs v0.12.0a1 (contains commit acdbbe8307e6)

https://github.com/ClusterLabs/pcs/commit/acdbbe8307e6f4a36b2c7754765e732e43fe8d17
redhatMentions a patch (unverified)

1299615 – (CVE-2016-0721) CVE-2016-0721 pcs: cookies are not invalidated upon logout

Affected: Red Hat Enterprise Linux 6, as the web UI functionality is disabled by default in pcsd.

https://bugzilla.redhat.com/show_bug.cgi?id=1299615
generic

CVE-2016-0721 - PSIRT.COM

http://www.securityfocus.com/bid/97977
generic
http://rhn.redhat.com/errata/RHSA-2016-2596.html

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatpcs-0:0.9.152-10.el72016-11-03redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
pcs—
  • every version up to 0.9.149-1: fixed in 0.9.149-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pcs—
  • every version up to 0.9.149-1: fixed in 0.9.149-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pcs—
  • every version up to 0.9.149-1: fixed in 0.9.149-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pcs—
  • every version up to 0.9.149-1: fixed in 0.9.149-1
—

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 7× 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.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-10-09 20:01 UTCEPSS rescore
  2. 2026-10-08 16:35 UTCEPSS rescore
  3. 2026-10-08 06:05 UTCOSV refresh
  4. 2026-10-07 23:40 UTCEPSS rescore
  5. 2026-10-06 15:11 UTCEPSS rescore
  6. 2026-10-05 17:38 UTCEPSS rescore
  7. 2026-10-03 14:21 UTCEPSS rescore
  8. 2026-09-30 14:58 UTCEPSS rescore
  9. 2026-09-30 14:58 UTCEPSS rescore
  10. 2026-09-30 09:09 UTCEG score recompute
  11. 2026-09-28 13:45 UTCEPSS rescore
  12. 2026-09-27 13:40 UTCEPSS rescore
  13. 2026-09-26 15:53 UTCEPSS rescore
  14. 2026-09-26 15:53 UTCEPSS rescore
  15. 2026-09-23 13:41 UTCEPSS rescore
  16. 2026-09-20 20:09 UTCEPSS rescore
  17. 2026-09-19 15:35 UTCEPSS rescore
  18. 2026-09-18 19:22 UTCEPSS rescore
  19. 2026-09-18 12:06 UTCOSV refresh
  20. 2026-09-17 19:21 UTCEPSS rescore
  21. 2026-09-15 03:05 UTCEPSS rescore
  22. 2026-09-13 16:41 UTCEPSS rescore
  23. 2026-09-12 14:55 UTCEPSS rescore
  24. 2026-09-11 09:31 UTCEPSS rescore
  25. 2026-09-10 09:26 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 15:56 UTCEPSS rescore
  2. 2026-09-06 13:42 UTCEPSS rescore
  3. 2026-09-04 13:55 UTCEPSS rescore
  4. 2026-09-02 14:07 UTCEPSS rescore
  5. 2026-09-01 13:48 UTCEPSS rescore
  6. 2026-09-01 03:31 UTCEPSS rescore
  7. 2026-08-30 12:42 UTCOSV refresh
  8. 2026-08-27 14:20 UTCEPSS rescore
  9. 2026-08-26 14:41 UTCEPSS rescore
  10. 2026-08-25 13:44 UTCEPSS rescore
  11. 2026-08-23 00:13 UTCEPSS rescore
  12. 2026-08-21 23:44 UTCEPSS rescore
  13. 2026-08-20 22:50 UTCEPSS rescore
  14. 2026-08-19 16:59 UTCEPSS rescore
  15. 2026-08-18 13:43 UTCEPSS rescore
  16. 2026-08-16 14:51 UTCEPSS rescore
  17. 2026-08-16 02:09 UTCEPSS rescore
  18. 2026-08-15 01:25 UTCEPSS rescore
  19. 2026-08-14 02:48 UTCOSV refresh
  20. 2026-08-12 13:46 UTCEPSS rescore
  21. 2026-08-11 13:36 UTCEPSS rescore
  22. 2026-08-09 13:42 UTCEPSS rescore
  23. 2026-08-08 16:32 UTCEPSS rescore
  24. 2026-08-07 16:22 UTCEPSS rescore
  25. 2026-08-06 13:42 UTCEPSS rescore
  26. 2026-08-05 19:12 UTCEPSS rescore
  27. 2026-08-04 15:04 UTCEPSS rescore
  28. 2026-08-04 10:31 UTCEPSS rescore
  29. 2026-08-01 04:11 UTCEPSS rescore
  30. 2026-07-30 01:26 UTCEPSS rescore
  31. 2026-07-30 01:26 UTCEPSS rescore
  32. 2026-07-29 07:33 UTCOSV refresh
  33. 2026-07-28 15:31 UTCEPSS rescore
  34. 2026-07-26 14:50 UTCEPSS rescore
  35. 2026-07-25 14:13 UTCEPSS rescore
  36. 2026-07-24 14:13 UTCEPSS rescore
  37. 2026-07-23 14:14 UTCEPSS rescore
  38. 2026-07-23 01:20 UTCEG score recompute
  39. 2026-07-23 00:22 UTCEG score recompute
  40. 2026-07-22 22:00 UTCEG score recompute
  41. 2026-07-22 14:04 UTCEPSS rescore
  42. 2026-07-21 15:21 UTCEPSS rescore
  43. 2026-07-21 15:21 UTCEPSS rescore
  44. 2026-07-20 17:03 UTCEPSS rescore
  45. 2026-07-19 14:27 UTCEPSS rescore
  46. 2026-07-19 14:27 UTCEPSS rescore
  47. 2026-07-19 02:26 UTCEPSS rescore
  48. 2026-07-19 02:26 UTCEPSS rescore
  49. 2026-07-18 10:00 UTCEPSS rescore
  50. 2026-07-16 16:59 UTCEPSS rescore
  51. 2026-07-15 16:54 UTCEPSS rescore
  52. 2026-07-15 16:54 UTCEPSS rescore
  53. 2026-07-15 01:56 UTCEPSS rescore
  54. 2026-07-13 22:26 UTCEPSS rescore
  55. 2026-07-13 22:26 UTCEPSS rescore
  56. 2026-07-12 05:42 UTCEPSS rescore
  57. 2026-07-12 00:11 UTCOSV refresh
  58. 2026-07-11 08:23 UTCEPSS rescore
  59. 2026-07-09 19:05 UTCEPSS rescore
  60. 2026-07-09 19:05 UTCEPSS rescore
  61. 2026-07-08 15:10 UTCEPSS rescore
  62. 2026-07-07 13:42 UTCEPSS rescore
  63. 2026-07-07 13:42 UTCEPSS rescore
  64. 2026-07-06 16:24 UTCEPSS rescore
  65. 2026-07-06 02:20 UTCEPSS rescore
  66. 2026-07-05 02:26 UTCEPSS rescore
  67. 2026-07-04 06:28 UTCEPSS rescore
  68. 2026-07-01 15:02 UTCEPSS rescore
  69. 2026-06-30 23:19 UTCEPSS rescore
  70. 2026-06-30 23:19 UTCEPSS rescore
  71. 2026-06-29 14:03 UTCEPSS rescore
  72. 2026-06-29 14:03 UTCEPSS rescore
  73. 2026-06-28 14:04 UTCEPSS rescore
  74. 2026-06-28 04:53 UTCEPSS rescore
  75. 2026-06-27 03:05 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Same vendor

1 shown

redhat:RHSA-2016:2596

Frequently asked(5)

What is CVE-2016-0721?
CVE-2016-0721 is a high vulnerability published on April 21, 2017. Session fixation vulnerability in pcsd in pcs before 0.9.157.
When was CVE-2016-0721 disclosed?
CVE-2016-0721 was first published on April 21, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-0721 actively exploited?
CVE-2016-0721 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (82nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-0721?
CVE-2016-0721 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2016-0721?
A fix for CVE-2016-0721 is available: update to the fixed version the vendor names in its advisory.

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