CVE-2026-71969

MEDIUMPre-NVD 6.76.7
EchelonGraph scoreMEDIUM confidence

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

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. A secondary CVSS source baseline 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-55699 (ENISA EUVD) · GHSA-hg7c-pmh6-576f (GitHub Security Advisories)Source: ENISA EUVD

6.7EG
EchelonGraph verdictMonitorThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.7Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.

CVSS v3
6.7
EG Score
6.7MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100

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)
Severity67% × 45%
Impact severity (EG Severity): CVSS 6.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.
EPSS PROB
0.2%
EPSS %ILE
7th
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 (6.7): severity, escalated by confirmed exploitation. This CVE's 6.7 is its impact severity (EG Severity), not escalated.

EG Severity
6.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 10, 2026

Last Modified

October 24, 2026

Advisory Details (4)

Auto-updated Aug 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
Web page

OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations | Advisories | VulnCheck

https://www.vulncheck.com/advisories/op-tee-os-buffer-underwrite-via-rsa-nopad-encrypt-decrypt-operations
GitHub commit

commit 7b8b494e0a32 (OP-TEE/optee_os)

Fix landed in OP-TEE/optee_os commit 7b8b494e0a32 — awaiting tagged release

https://github.com/OP-TEE/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3
GitHub pull request

Se050 fix

Fix merged in OP-TEE/optee_os PR #7808 on 2026-08-03 — awaiting tagged release

https://github.com/OP-TEE/optee_os/pull/7808
GitHub pull request

crypto: rsa: reject RSA NOPAD input longer than the modulus

Upstream fix in progress (PR #7898 · OP-TEE/optee_os, state=closed)

https://github.com/OP-TEE/optee_os/pull/7898

Vendor Advisories for CVE-2026-71969(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
optee-os4.10.0-1 ... 4.9.0-1 (6 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 49× 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.

Showing the most recent 100 of 182 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 82 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-29 16:58 UTCEG score recompute
  5. 2026-10-29 16:58 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  6. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-25 14:07 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-24 15:29 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  14. 2026-10-23 19:33 UTCEG score recompute
  15. 2026-10-23 19:33 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  16. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-22 19:23 UTCEG score recompute
  18. 2026-10-22 19:23 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  19. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  24. 2026-10-18 03:16 UTCEG score recompute
  25. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 75 more
  1. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-12 15:42 UTCEG score recompute
  7. 2026-10-11 19:28 UTCEG score recompute
  8. 2026-10-11 16:43 UTCEG score recompute
  9. 2026-10-11 14:03 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-06 18:21 UTCEG score recompute
  16. 2026-10-06 18:21 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-05 07:46 UTCEG score recompute
  20. 2026-10-05 07:46 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-04 04:25 UTCEG score recompute
  23. 2026-10-04 04:25 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  24. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-02 09:18 UTCEG score recompute
  26. 2026-10-02 09:18 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  27. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  28. 2026-09-30 22:35 UTCEG score recompute
  29. 2026-09-30 22:35 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  30. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  31. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  32. 2026-09-28 13:18 UTCEG score recompute
  33. 2026-09-28 13:18 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  34. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  35. 2026-09-27 12:42 UTCEG score recompute
  36. 2026-09-27 12:42 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  38. 2026-09-24 20:17 UTCEG score recompute
  39. 2026-09-24 20:17 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  40. 2026-09-23 23:36 UTCEG score recompute
  41. 2026-09-23 23:36 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  42. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  43. 2026-09-22 22:37 UTCEG score recompute
  44. 2026-09-22 22:37 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  45. 2026-09-21 22:01 UTCEG score recompute
  46. 2026-09-21 22:01 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  47. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-09-20 20:04 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  50. 2026-09-19 17:53 UTCEG score recompute
  51. 2026-09-19 17:53 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  52. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-09-18 17:17 UTCEG score recompute
  54. 2026-09-18 17:17 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  55. 2026-09-17 14:53 UTCEG score recompute
  56. 2026-09-17 14:53 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  57. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-09-16 10:59 UTCEG score recompute
  59. 2026-09-16 10:59 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  60. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  61. 2026-09-15 09:43 UTCEG score recompute
  62. 2026-09-15 09:43 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  63. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  64. 2026-09-14 09:07 UTCEG score recompute
  65. 2026-09-14 09:07 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  66. 2026-09-13 08:32 UTCEG score recompute
  67. 2026-09-13 08:32 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  68. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  69. 2026-09-12 07:56 UTCEG score recompute
  70. 2026-09-12 07:56 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  71. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-09-11 07:03 UTCEG score recompute
  73. 2026-09-11 07:03 UTCGHSA enrichmentGHSA-hg7c-pmh6-576f · GitHub severity HIGH · GitHub CVSS 6.7
  74. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  75. 2026-09-10 06:27 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-71969?
CVE-2026-71969 is a medium-severity vulnerability; its CVE record was published on August 10, 2026. OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an…
When was CVE-2026-71969 made public?
CVE-2026-71969 was made public on July 30, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 10, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-71969 actively exploited?
CVE-2026-71969 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71969?
CVE-2026-71969 has a CVSS base score of 6.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71969?
An upstream fix for CVE-2026-71969 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-71969 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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