CVE-2026-53413Patch

MEDIUMCVSS 8.3 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Patch affected systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

Missing bounds check in the annotator function of Zoom Clients allows buffer over-write, which may allow a meeting participant to achieve remote code execution of another participant via network access.

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4.3/ 10 priority

Sources & remediation

Other references

https://www.zoom.com/en/trust/security-bulletin/zsb-26015

Weakness type (CWE)

CWE-787

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

DECLINING

Threat summary

Public PoC and exploit tooling are both present
Patch or workaround signal is available
29 mentions across 9 observed days
Momentum state: declining

What's happening

Exploit tool or code specified in 1 signal
PoC mentioned or linked in 2 signals
Patch or workaround mentioned in 21 signals
Technical details provided in 25 signals
Disclosure: 8 classified signals
General: 2 classified signals
Peaked 7d ago at 11 mentions (2026-08-12); latest day: 1
29 total mentions across 9 days

Deep dive

Activity timeline29 mentions / 9d

Signal classification4 categories

Patch

1758.6%

Disclosure

827.6%

General

26.9%

PoC

26.9%

Referenced assets16 URLs

By indicator

Classification over time

Date	Total	Labels

2026-08-11	2	Patch2
2026-08-12	11	Disclosure4General2Patch5
2026-08-13	7	Disclosure2Patch4PoC1
2026-08-14	4	Disclosure1Patch3
2026-08-15	1	Patch1
2026-08-17	1	Patch1
2026-08-20	1	Patch1
2026-08-21	1	Disclosure1
2026-09-11	1	PoC1

Full discourse20 posts

Mr. OS@ksg93rd44d
PoC
#AppSec 1⃣. ShieldBreak - Windows Defender 0day vulnerability https://git.projectnightcrawler.dev/NightmareEclipse/ShieldBreak/src/branch/main 2⃣. Zoomsday: Zero-click RCE in Zoom, from any meeting participant to any other (CVE-2026-53413) https://a.security/blog/asecurity-zoomsday 3⃣. Microsoft SharePoint JWT Token Authentication Bypass (CVE-2026-55040) https://www.rapid7.com/blog/post/ra-microsoft-sharepoint-jwt-token-authentication-bypass-cve-2026-55040 http://www.kismoe.com
Post summary
The post showcases three zero‑day vulnerabilities, linking to PoC repositories or detailed blog entries, but does not mention active exploitation, patches, or debunking.
13511971128.0K
3.4K followersView on X
CiberBaur@BotBauR46d
Patch
🚨 Breaking: Zoom parchea vulnerabilidad de zero-click que permite ejecución de código remoto a través de la función de anotación. Zoom ha parcheado cuatro vulnerabilidades, incluyendo una crítica de zero-click, CVE-2026-53413, en su función de anotación. Esta vulnerabilidad, encontrada por A Security, podría permitir a un participante de una reunión ejecutar código en la computadora de otro usuario sin intervención del usuario. La vulnerabilidad, un problema de corrupción de memoria, podría ser explotada por un atacante para ejecutar código arbitrario en el sistema de la víctima. Los sistemas afectados incluyen aquellos que utilizan la función de anotación de Zoom. El impacto de esta vulnerabilidad es significativo, ya que podría permitir a un atacante acceder a información confidencial o tomar control de la computadora de la víctima. Es importante que los usuarios de Zoom actualicen su software lo antes posible para evitar ser afectados por esta vulnerabilidad. ¿Hay parche? Sí, Zoom ha liberado un parche para esta vulnerabilidad. ¿Qué deben hacer los afectados HOY? Actualizar su software de Zoom lo antes posible y revisar los logs de seguridad para detectar cualquier actividad sospechosa. ¿Estás en riesgo? Revisa esto: actualiza tu software y mantén tus sistemas actualizados. #Ciberseguridad #CVE #SeguridadDigital #Threat https://securityaffairs.com/197042/hacking/zoom-patches-zoomsday-zero-click-flaw-enabling-remote-code-execution.html
Post summary
Zoom issued a patch for CVE-2026-53413, a zero-click memory corruption flaw enabling remote code execution via its annotation feature.
02050172
631 followersView on X
kokumօtօ@__kokumoto46d
Patch
Zoomで他の会議参加者が乗っ取れる脆弱性が修正されていた。6月と7月の更新で配信。CVE-2026-53413~53415はアノテーションの取扱いにおける不備。 https://thehackernews.com/2026/08/zoom-annotation-flaws-could-let-meeting.html?m=1
Post summary
Zoom fixed annotation‑handling vulnerabilities (CVE‑2026‑53413‑15) that could allow meeting participants to be hijacked, with the patch applied in updates released in June and July.
100411.1K
7.8K followersView on X
Sequretek@sequretek_sqtk37d
Disclosure
🚨 Zoomsday: Critical zero-click RCE in Zoom. CVE-2026-53413 could enable silent device takeover without user interaction, with potential camera/mic surveillance and credential theft. Read more - https://www.sequretek.com/resources/threat-advisories/Zoomsday%20-%20Critical%20Zero-Click%20RCE%20in%20Zoom #Cybersecurity #Sequretek https://t.co/WdH3xpfhg2
Post summary
Sequretek discloses CVE-2026-53413 as a critical zero‑click RCE in Zoom that can silently take over devices, enabling camera/mic surveillance and credential theft.
0103058
877 followersView on X
CCB Alert@CCBalert37d
Patch
Warning: #Zero-click #RCE in #Zoom clients! CVE-2026-53413 (CVSS 8.3), an out-of-bounds write vulnerability, could let a meeting participant to execute code on another device without a click or download. https://ccb.belgium.be/advisories/warning-zero-click-remote-code-execution-zoom-clients-patch-immediately #Patch #Patch #Patch
Post summary
The advisory alerts about CVE-2026-53413, a zero‑click RCE in Zoom clients, details it as an out‑of‑bounds write with CVSS 8.3, and urges users to apply the patch immediately.
02001397
7.2K followersView on X
GovCERT.CZ@GOVCERT_CZ43d
Patch
🚨 Upozorňujeme na "Zoomsday", zero-click RCE zranitelnost v produktech Zoom, CVE-2026-53413. Zranitelnost typu přetečení zásobníku je způsobena chybějící kontrolou mezí polí ve funkci "annotator". Útočník vystupující jako účastník schůzky může prostřednictvím síťového přístupu vyvolat přepsání vyrovnávací paměti na zařízení jiného účastníka, což může vést ke vzdálenému spuštění kódu (RCE). Zranitelnost má hodnocení CVSS 8,3 a postihuje produkty Zoom Workplace, Zoom Rooms a Zoom Meeting SDK. Pro zneužití je vyžadována účast ve stejné schůzce jako cílový uživatel. 📌Doporučujeme aktualizovat Zoom Workplace na verzi 7.1.5 nebo 7.0.6 a novější, Zoom Rooms na verzi 7.1.5 a novější a Zoom Meeting SDK na verzi 7.1.5 a novější
Post summary
The post announces a zero‑click RCE in Zoom products, detailing the vulnerability and urging updates to specified versions as the patch measure.
02010565
4.3K followersView on X
セキュリティ対策Lab@securityLab_jp45d
Disclosure
Zoomの注釈機能に複数の脆弱性、会議参加者同士が互いのクライアントを乗っ取り可能な状態(CVE-2026-53413、CVE-2026-53414、CVE-2026-53415) https://rocket-boys.co.jp/security-measures-lab/zoom-annotation-vulnerabilities-cve-2026-53413/ #セキュリティ対策Lab #security #securitynews #脆弱性
Post summary
The post reports three CVEs (CVE-2026-53413, 53414, 53415) affecting Zoom’s annotation feature, enabling participants to hijack each other's clients; no PoC, exploit code, patches, or evidence of active exploitation are mentioned.
01010194
545 followersView on X
Ryx@PadhiyarRushi16d
PoC
ZOOMSDAY is still one of the more interesting zero-click chains this year. Three annotation-protocol bugs (CVE-2026-53413 and friends). One meeting participant can send crafted annotation data and achieve RCE on another participant’s client like Windows, macOS, iOS, Android; with no click required. Researchers at A Security built a working exploit in under 24 hours with fewer than 20 prompts to public models. https://a.security/blog/asecurity-zoomsday #AppSec #ZeroClick #Cybersecurity #Infosec #Trending #AI #Claude #GPT
Post summary
The post discloses zero‑click RCE CVEs in Zoom annotations and notes that researchers swiftly created a PoC, but it offers no evidence of active exploitation, patches, or detailed exploit code.
00010165
809 followersView on X
Jim Nitterauer 🇺🇸@JNitterauer40d
Patch
Zoom patches "Zoomsday" zero-click RCE that lets any meeting participant hijack others' devices — Zoom released bulletins on August 11 fixing four flaws, led by CVE-2026-53413 (CVSS 8. #CyberSecurity #InfoSec https://www.securityweek.com/zoom-patches-zero-click-code-execution-vulnerability/
Post summary
Zoom issued a patch for a zero‑click RCE flaw (CVE-2026‑53413) that could let participants hijack devices; the post focuses on the patch and technical details, with no evidence of ongoing exploitation or PoC.
00010163
8.5K followersView on X
Cyber Warriors Meetup@CWMCommunity43d
Patch
A newly reported vulnerability chain — CVE-2026-53413/14/15 — could allow a malicious Zoom participant to compromise another participant's device without a victim click or download. Update Zoom now. Zero-click ≠ zero risk. #CyberSecurity #Zoom #ZeroClick #CVE #CyberNews https://t.co/ZPFDGkvZtq
Post summary
The tweet alerts to a zero‑click Zoom vulnerability chain (CVE‑2026‑53413/14/15) and urges users to update Zoom, but provides no exploit details or evidence of active attacks.
0001057
9 followersView on X
Upwind Security MDR@UpwindMDR44d
Disclosure
🚨 CVE-2026-53413 A critical vulnerability in Zoom's annotation functionality could allow a malicious meeting participant to achieve remote code execution (RCE) on another participant's device over the network. Affected products include: • Zoom Workplace before 7.1.5 and 7.0.6 • Zoom Workplace VDI Client for Windows before 7.0.11 and 6.6.16 • Zoom Rooms before 7.1.0 • Zoom Meeting SDK before 7.1.0 Because exploitation can occur during an active meeting, organizations should prioritize patching affected clients and reviewing environments that rely on Zoom collaboration tools. https://www.zoom.com/en/trust/security-bulletin/zsb-26015/
Post summary
Zoom announces CVE-2026-53413 as a critical RCE vulnerability in annotation features, advises immediate patching, and provides affected product details.
01000236
288 followersView on X
WHISPR@WhisprNews44d
Disclosure
🚨 'Zoomsday': A Security destapa dos fallos zero-click en Zoom (CVE-2026-53413 y CVE-2026-53415, severidad 8.3) que dan control del dispositivo sin un solo click. En riesgo: sesiones de intercambio y software de billetera. Parchea ya: 7.1.5 / 7.0.6. https://t.co/INsRSv5Xum
Post summary
The tweet announces the discovery of two zero‑click vulnerabilities in Zoom (CVE‑2026‑53413 and CVE‑2026‑53415) with severity 8.3, highlights the risk of device takeover, and urges users to apply the latest patches (7.1.5 / 7.0.6).
00100142
4.1K followersView on X
NOCTIS@NoctisIntel45d
Patch
Zoom "Zoomsday" zero-click RCE (CVE-2026-53413/53414/53415) Any meeting participant → full RCE on EVERY other attendee via annotation-message handling. Zero clicks. Patch now; disable annotations org-wide until deployed. #ThreatIntel #ZeroClick #CVE202653413
Post summary
A zero‑click RCE flaw in Zoom’s annotation handling (CVE‑2026‑53413/14/15) was disclosed, and a patch is available with a recommendation to disable annotations until the update is applied.
0000156
29 followersView on X
🍓Mx_Issue🦑@Mx_Issue45d
Disclosure
https://rocket-boys.co.jp/security-measures-lab/zoom-annotation-vulnerabilities-cve-2026-53413/
Post summary
The linked article announces a newly identified Zoom annotation vulnerability (CVE‑2026‑53413), but it does not provide evidence of exploitation, a PoC, or patch information.
00010105
796 followersView on X
Tech Start XYZ@TechStartXYZ45d
Patch
🚨 ALERTA CRÍTICO DE SEGURANÇA NO ZOOM Pesquisadores identificaram vulnerabilidades de alto impacto batizadas de "Zoomsday", que permitem a invasão de dispositivos durante chamadas de vídeo. 🔓 A falha CVE-2026-53413 possibilita a execução remota de código sem necessidade de clique da vítima. 💻 O problema reside no componente de anotações e desenhos em tempo real da plataforma. ⚙️ A falha foi descoberta em menos de 24 horas com o auxílio de modelos de inteligência artificial. 🛡️ Versões do Zoom Workplace, VDI Client, Zoom Rooms e SDK foram afetadas em todas as plataformas. Recomenda-se a atualização imediata de todos os aplicativos Zoom instalados em ambientes corporativos e pessoais para as edições corrigidas fornecidas pela desenvolvedora.
Post summary
The alert warns that CVE‑2026‑53413 in Zoom’s annotation component allows remote code execution and urges users to apply vendor‑supplied patches immediately.
0001061
168 followersView on X
CyberTLDR@CyberTLDR46d
General
1/3 One malformed drawing on a Zoom call could hijack every viewer's client. Annotation flaws let a screen-sharer take over watching attendees. CVE-2026-53413 scores 8.3. Updated your Zoom? #CyberSecurity #InfoSec #CVE #TechNews
Post summary
The post highlights a Zoom annotation vulnerability (CVE‑2026‑53413) that could allow malicious screen‑sharing hijacking of viewers, but it provides no PoC, exploit, patch, or evidence of active exploitation.
1000057
41 followersView on X
Mich@dubstard46d
General
CVE-2026-53413 hahaha fuck you zoom
Post summary
The text merely references a CVE without providing any actionable or technical details.
00010165
1.8K followersView on X
CyberSignal | Cybersecurity News@XQOPTRX42d
Patch
CyberSec Daily ✓ · 🚨 Critical Update · August 15, 2026 🎯 Zoom users urged to update after high-severity client vulnerabilities Zoom has updated advisories for CVE-2026-53413, CVE-2026-53414 and CVE-2026-53415, covering memory-safety weaknesses in Zoom clients. Security researchers warn that vulnerable clients could face serious compromise risks during malicious meeting interactions. Zoom recommends installing the latest available version. 🔗 Sources: Zoom Security Bulletins / TechRadar #Zoom #CVE #PatchNow #RemoteWork #Vulnerability
Post summary
The tweet urges users to update Zoom to mitigate memory-safety weaknesses; it does not provide exploitation proof or active usage reports.
0000037
58 followersView on X
Helient Technologies, LLC@Helient43d
Disclosure
Zoom Users: High Severity Vulnerability Requires Immediate Update. A newly disclosed high-severity vulnerability (CVE-2026-53413) could allow a malicious meeting participant to execute code on another participant's device during a Zoom session. https://hubs.ly/Q04t4YX20 #Helient https://t.co/ioUHjC0eYi
Post summary
A new high‑severity Zoom vulnerability (CVE‑2026‑53413) could enable malicious participants to run code on other users’ devices, and users are urged to apply an upcoming patch.
0000046
395 followersView on X
Security Arsenal, LLC@SecurityAr5840944d
Patch
🔒 #CyberSecurity CVE-2026-53413: Zoom "Zoomsday" Zero-Click RCE via Annotation Feature — Detecti… "Zoom has patched four vulnerabilities in its collaboration client — and one of them is the…" 🔗 https://securityarsenal.com/blog/cve-2026-53413-zoom-zoomsday-zero-click-rce-via-annotation-feature-detection-and-remediation-guide #CyberSecurity #ThreatIntel #critical #zeroday #cve
Post summary
The post announces that Zoom has released a patch for CVE-2026-53413, a Zero-Click RCE vulnerability in its annotation feature.
0000071
23 followersView on X

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What researchers are saying

CVE-2026-53413

CiberBaur[verified]@BotBauRPatch

Zoom issued a patch for CVE-2026-53413, a zero-click memory corruption flaw enabling remote code execution via its annotation feature.

kokumօtօ[verified]@__kokumotoPatch

Zoom fixed annotation‑handling vulnerabilities (CVE‑2026‑53413‑15) that could allow meeting participants to be hijacked, with the patch applied in updates released in June and July.

GovCERT.CZ[verified]@GOVCERT_CZPatch

The post announces a zero‑click RCE in Zoom products, detailing the vulnerability and urging updates to specified versions as the patch measure.

セキュリティ対策Lab[verified]@securityLab_jpDisclosure

The post reports three CVEs (CVE-2026-53413, 53414, 53415) affecting Zoom’s annotation feature, enabling participants to hijack each other's clients; no PoC, exploit code, patches, or evidence of active exploitation are mentioned.

Ryx[verified]@PadhiyarRushiPoC

The post discloses zero‑click RCE CVEs in Zoom annotations and notes that researchers swiftly created a PoC, but it offers no evidence of active exploitation, patches, or detailed exploit code.

Upwind Security MDR[verified]@UpwindMDRDisclosure

Zoom announces CVE-2026-53413 as a critical RCE vulnerability in annotation features, advises immediate patching, and provides affected product details.

WHISPR[verified]@WhisprNewsDisclosure

The tweet announces the discovery of two zero‑click vulnerabilities in Zoom (CVE‑2026‑53413 and CVE‑2026‑53415) with severity 8.3, highlights the risk of device takeover, and urges users to apply the latest patches (7.1.5 / 7.0.6).

Tech Start XYZ[verified]@TechStartXYZPatch

The alert warns that CVE‑2026‑53413 in Zoom’s annotation component allows remote code execution and urges users to apply vendor‑supplied patches immediately.