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TI-2026-40202 Aliases CVE-2026-55687

ESF-IDF: Stack-Based Out-of-Bounds Write in JPEG Decoder DQT Marker Parsing

Priority MEDIUM 40CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Versions 6.0.1, 5.5.4, 5.4.4, 5.3.5, and possibly prior contain an out-of-bounds write in jpeg_parse_dqt_marker() in components/esp_driver_jpeg/jpeg_parse_marker.c because the attacker-controlled DQT marker Tq nibble is used as an index into the qt_tbl array without validating that it is in the range 0..3, allowing malformed JPEG input to corrupt stack memory and reliably trigger a denial of service. This issue is fixed in version 6.0.2 and is expected to be fixed in versions 5.5.5, 5.4.5, and 5.3.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.007 53rd percentileScored 2026-11-07
Fix Fixed esp-idf (espressif): 6.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifesp-idf6.0.0 to before 6.0.2; 5.5.0 – 5.5.4; 5.4.0 – 5.4.4; up to 5.3.56.0.2Patch availableCNA
  • esp-idf Vendorespressif Affected 6.0.0 to before 6.0.2; 5.5.0 – 5.5.4; 5.4.0 – 5.4.4; up to 5.3.5 Fixed in 6.0.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*——espressif
  • cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:* Versions — — ·espressif

Remediation

  • Fix · CNA esp-idf (espressif) Fixed in 6.0.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55687

References

Other 7

  • TI-2026-31061 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE CVSS 3.1CRITICAL 9.8
  • TI-2024-30765 Multiple Poisoned Pipeline Execution (PPE) vulnerabilities CVSS 3.1CRITICAL 10.0
  • TI-2026-30028 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption CVSS 3.1HIGH 8.8
  • TI-2025-33484 CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution CVSS 4.0HIGH 8.7
  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2025-33011 arduino-esp32 vulnerable to CRLF injection in WebServer.cpp CVSS 4.0HIGH 8.9
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences