CVE-2026-52836

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 47% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenDDS is an open source C++ implementation of the Object Management Group (OMG) Data Distribution Service (DDS). Prior to 3.34.0, a network attacker can crash a reachable OpenDDS participant by sending a malformed RTPS UDP submessage whose crafted length or sequence-number state causes dds/DCPS/transport/rtps_udp/RtpsUdpReceiveStrategy.cpp in RtpsUdpReceiveStrategy::handle_input() to advance ACE_Message_Block::rd_ptr() beyond valid data. The parser can then call dds/DCPS/transport/rtps_udp/RtpsSampleHeader.cpp in RtpsSampleHeader::init(), which dereferences the invalid read pointer without first validating it against wr_ptr() or ensuring that a complete submessage header remains. The resulting SIGSEGV occurs in the receive thread, terminates the DDS process, and destroys the DDS entities hosted by that participant. No authentication, prior protocol state, or victim interaction is required. This issue is fixed in version 3.34.0.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 24, 2026

Advisory Details (7)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available

OpenDDS 3.34.0

Patch available: OpenDDS/OpenDDS v3.34.0

https://github.com/OpenDDS/OpenDDS/releases/tag/v3.34.0
github_commit

commit e5aee3f5b18e (OpenDDS/OpenDDS)

Fix landed in OpenDDS/OpenDDS commit e5aee3f5b18e — awaiting tagged release

https://github.com/OpenDDS/OpenDDS/commit/e5aee3f5b18ee7174d66c3e7818270e1ba2cc2fa
github_commit

commit d6bdddde9ee0 (OpenDDS/OpenDDS)

Fix landed in OpenDDS/OpenDDS commit d6bdddde9ee0 — awaiting tagged release

https://github.com/OpenDDS/OpenDDS/commit/d6bdddde9ee07f9ee0b461680e5fb64f95cd1251
github_commit

commit b46382ebc50d (OpenDDS/OpenDDS)

Fix landed in OpenDDS/OpenDDS commit b46382ebc50d — awaiting tagged release

https://github.com/OpenDDS/OpenDDS/commit/b46382ebc50d46f933ad6c860a396bffa97adbd7
github_commit

commit 3ded3341e89d (OpenDDS/OpenDDS)

Fix landed in OpenDDS/OpenDDS commit 3ded3341e89d — awaiting tagged release

https://github.com/OpenDDS/OpenDDS/commit/3ded3341e89db88e4c4e09d5153e05730b0a84ce
github_pr

Improve RtpsSampleHeader Length Checking

Fix merged in OpenDDS/OpenDDS PR #5210 on 2026-04-22 — awaiting tagged release

https://github.com/OpenDDS/OpenDDS/pull/5210
github Patch Available🟡 PoC Available

SIGSEGV: out-of-bounds `rd_ptr` dereference in `RtpsSampleHeader::init` — triggered by malformed RTPS submessage, remotely exploitable denial of service · Advisory · OpenDDS/OpenDDS · GitHub

https://github.com/OpenDDS/OpenDDS/security/advisories/GHSA-wcr7-gccq-vv56

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 15× 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.

  1. 2026-09-24 21:25 UTCEG score recompute
  2. 2026-09-23 22:13 UTCEG score recompute
  3. 2026-09-23 17:53 UTCEPSS rescore
  4. 2026-09-22 20:52 UTCEG score recompute
  5. 2026-09-22 08:11 UTCEG score recompute
  6. 2026-09-21 06:50 UTCEG score recompute
  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 16:47 UTCEG score recompute
  9. 2026-09-19 04:06 UTCEG score recompute
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 15:26 UTCEG score recompute
  12. 2026-09-18 14:54 UTCEG score recompute
  13. 2026-09-17 18:26 UTCEG score recompute
  14. 2026-09-17 17:20 UTCEG score recompute
  15. 2026-09-17 17:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-52836?
CVE-2026-52836 is a high vulnerability published on September 17, 2026. OpenDDS is an open source C++ implementation of the Object Management Group (OMG) Data Distribution Service (DDS). Prior to 3.34.0, a network attacker can crash a reachable OpenDDS participant by sending a malformed RTPS UDP submessage whose crafted length or sequence-number state causes…
When was CVE-2026-52836 disclosed?
CVE-2026-52836 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52836 actively exploited?
CVE-2026-52836 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52836?
CVE-2026-52836 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-52836?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52836, 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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